-//===-- llvm-bcanalyzer.cpp - Byte Code Analyzer --------------------------===//
-//
+//===-- llvm-bcanalyzer.cpp - Bitcode Analyzer --------------------------===//
+//
// The LLVM Compiler Infrastructure
//
-// This file was developed by Reid Spencer and is distributed under the
-// University of Illinois Open Source License. See LICENSE.TXT for details.
-//
+// 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 bytecode from stdin
-// llvm-bcanalyzer [options] x.bc - Read LLVM bytecode from the x.bc file
+// 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
-// --nodetails - Don't print out detailed informaton about individual
-// blocks and functions
-// --dump - Dump low-level bytecode structure in readable format
+// --dump - Dump low-level bitcode structure in readable format
//
-// This tool provides analytical information about a bytecode file. It is
-// intended as an aid to developers of bytecode reading and writing software. It
-// produces on std::out a summary of the bytecode file that shows various
+// 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 bytecode blocks and the
-// functions in the module. To avoid this more detailed output, use the
-// -nodetails option to limit the output to just module level information.
-// The tool is also able to print a bytecode file in a straight forward text
-// format that shows the containment and relationships of the information in
-// the bytecode file (-dump option).
+// 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/Bytecode/Analyzer.h"
-#include "Support/CommandLine.h"
-#include "llvm/System/Signals.h"
-#include <fstream>
-#include <iostream>
-
+#include "llvm/Bitcode/BitstreamReader.h"
+#include "llvm/Bitcode/LLVMBitCodes.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/IR/Verifier.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/Signals.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/system_error.h"
+#include <algorithm>
+#include <cctype>
+#include <map>
using namespace llvm;
static cl::opt<std::string>
- InputFilename(cl::Positional, cl::desc("<input bytecode>"), cl::init("-"));
+ 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"));
-static cl::opt<bool> NoDetails ("nodetails", cl::desc("Skip detailed output"));
-static cl::opt<bool> Dump ("dump", cl::desc("Dump low level bytecode trace"));
-static cl::opt<bool> Verify ("verify", cl::desc("Progressively verify module"));
+//===----------------------------------------------------------------------===//
+// 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 nullptr;
+ }
+
+ // 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 nullptr;
+
+ switch (BlockID) {
+ default: return nullptr;
+ case bitc::MODULE_BLOCK_ID: return "MODULE_BLOCK";
+ case bitc::PARAMATTR_BLOCK_ID: return "PARAMATTR_BLOCK";
+ case bitc::PARAMATTR_GROUP_BLOCK_ID: return "PARAMATTR_GROUP_BLOCK_ID";
+ 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::VALUE_SYMTAB_BLOCK_ID: return "VALUE_SYMTAB";
+ case bitc::METADATA_BLOCK_ID: return "METADATA_BLOCK";
+ case bitc::METADATA_ATTACHMENT_ID: return "METADATA_ATTACHMENT_BLOCK";
+ case bitc::USELIST_BLOCK_ID: return "USELIST_BLOCK_ID";
+ }
+}
+
+/// 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 nullptr;
+ case bitc::BLOCKINFO_CODE_SETBID: return "SETBID";
+ case bitc::BLOCKINFO_CODE_BLOCKNAME: return "BLOCKNAME";
+ case bitc::BLOCKINFO_CODE_SETRECORDNAME: return "SETRECORDNAME";
+ }
+ }
+ return nullptr;
+ }
+
+ // 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 nullptr;
+
+ switch (BlockID) {
+ default: return nullptr;
+ case bitc::MODULE_BLOCK_ID:
+ switch (CodeID) {
+ default: return nullptr;
+ 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"; // FIXME: Remove in 4.0
+ 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 nullptr;
+ case bitc::PARAMATTR_CODE_ENTRY_OLD: return "ENTRY";
+ case bitc::PARAMATTR_CODE_ENTRY: return "ENTRY";
+ case bitc::PARAMATTR_GRP_CODE_ENTRY: return "ENTRY";
+ }
+ case bitc::TYPE_BLOCK_ID_NEW:
+ switch (CodeID) {
+ default: return nullptr;
+ 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_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::TYPE_CODE_FUNCTION: return "FUNCTION";
+ }
+
+ case bitc::CONSTANTS_BLOCK_ID:
+ switch (CodeID) {
+ default: return nullptr;
+ 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::CST_CODE_BLOCKADDRESS: return "CST_CODE_BLOCKADDRESS";
+ case bitc::CST_CODE_DATA: return "DATA";
+ }
+ case bitc::FUNCTION_BLOCK_ID:
+ switch (CodeID) {
+ default: return nullptr;
+ 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_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::VALUE_SYMTAB_BLOCK_ID:
+ switch (CodeID) {
+ default: return nullptr;
+ case bitc::VST_CODE_ENTRY: return "ENTRY";
+ case bitc::VST_CODE_BBENTRY: return "BBENTRY";
+ }
+ case bitc::METADATA_ATTACHMENT_ID:
+ switch(CodeID) {
+ default:return nullptr;
+ case bitc::METADATA_ATTACHMENT: return "METADATA_ATTACHMENT";
+ }
+ case bitc::METADATA_BLOCK_ID:
+ switch(CodeID) {
+ default:return nullptr;
+ 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";
+ }
+ case bitc::USELIST_BLOCK_ID:
+ switch(CodeID) {
+ default:return nullptr;
+ case bitc::USELIST_CODE_ENTRY: return "USELIST_CODE_ENTRY";
+ }
+ }
+}
+
+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;
-int
-main(int argc, char **argv)
-{
- cl::ParseCommandLineOptions(argc, argv,
- " llvm-bcanalyzer Analysis of ByteCode Dumper\n");
- sys::PrintStackTraceOnErrorSignal();
- std::ostream* Out = &std::cout; // Default to printing to stdout...
- std::istream* In = &std::cin; // Default to reading stdin
- std::string ErrorMessage;
- BytecodeAnalysis bca;
+/// 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 BlockID,
+ unsigned IndentLevel) {
+ std::string Indent(IndentLevel*2, ' ');
+ uint64_t BlockBitStart = Stream.GetCurrentBitNo();
+
+ // Get the statistics for this BlockID.
+ PerBlockIDStats &BlockStats = BlockIDStats[BlockID];
+
+ BlockStats.NumInstances++;
- /// Determine what to generate
- bca.detailedResults = !NoDetails;
- bca.progressiveVerify = Verify;
+ // BLOCKINFO is a special part of the stream.
+ if (BlockID == bitc::BLOCKINFO_BLOCK_ID) {
+ if (Dump) outs() << 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");
- /// Analyze the bytecode file
- Module* M = AnalyzeBytecodeFile(InputFilename, bca, &ErrorMessage, (Dump?Out:0));
+ const char *BlockName = nullptr;
+ if (Dump) {
+ outs() << Indent << "<";
+ if ((BlockName = GetBlockName(BlockID, *Stream.getBitStreamReader())))
+ outs() << BlockName;
+ else
+ outs() << "UnknownBlock" << BlockID;
- // All that bcanalyzer does is write the gathered statistics to the output
- PrintBytecodeAnalysis(bca,*Out);
+ if (NonSymbolic && BlockName)
+ outs() << " BlockID=" << BlockID;
+
+ outs() << " 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();
+
+ BitstreamEntry Entry =
+ Stream.advance(BitstreamCursor::AF_DontAutoprocessAbbrevs);
+
+ switch (Entry.Kind) {
+ case BitstreamEntry::Error:
+ return Error("malformed bitcode file");
+ case BitstreamEntry::EndBlock: {
+ uint64_t BlockBitEnd = Stream.GetCurrentBitNo();
+ BlockStats.NumBits += BlockBitEnd-BlockBitStart;
+ if (Dump) {
+ outs() << Indent << "</";
+ if (BlockName)
+ outs() << BlockName << ">\n";
+ else
+ outs() << "UnknownBlock" << BlockID << ">\n";
+ }
+ return false;
+ }
+
+ case BitstreamEntry::SubBlock: {
+ uint64_t SubBlockBitStart = Stream.GetCurrentBitNo();
+ if (ParseBlock(Stream, Entry.ID, 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;
+ continue;
+ }
+ case BitstreamEntry::Record:
+ // The interesting case.
+ break;
+ }
- if ( M && Verify ) {
- std::string verificationMsg;
- try {
- verifyModule( *M, ThrowExceptionAction );
- } catch (std::string& errmsg ) {
- verificationMsg = errmsg;
+ if (Entry.ID == bitc::DEFINE_ABBREV) {
+ Stream.ReadAbbrevRecord();
+ ++BlockStats.NumAbbrevs;
+ continue;
}
- if ( verificationMsg.length() > 0 )
- std::cerr << "Final Verification Message: " << verificationMsg << "\n";
+
+ Record.clear();
+
+ ++BlockStats.NumRecords;
+
+ StringRef Blob;
+ unsigned Code = Stream.readRecord(Entry.ID, Record, &Blob);
+
+ // 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 (Entry.ID != bitc::UNABBREV_RECORD) {
+ BlockStats.CodeFreq[Code].NumAbbrev++;
+ ++BlockStats.NumAbbreviatedRecords;
+ }
+
+ if (Dump) {
+ outs() << Indent << " <";
+ if (const char *CodeName =
+ GetCodeName(Code, BlockID, *Stream.getBitStreamReader()))
+ outs() << CodeName;
+ else
+ outs() << "UnknownCode" << Code;
+ if (NonSymbolic &&
+ GetCodeName(Code, BlockID, *Stream.getBitStreamReader()))
+ outs() << " codeid=" << Code;
+ if (Entry.ID != bitc::UNABBREV_RECORD)
+ outs() << " abbrevid=" << Entry.ID;
+
+ for (unsigned i = 0, e = Record.size(); i != e; ++i)
+ outs() << " op" << i << "=" << (int64_t)Record[i];
+
+ outs() << "/>";
+
+ if (Blob.data()) {
+ outs() << " blob data = ";
+ bool BlobIsPrintable = true;
+ for (unsigned i = 0, e = Blob.size(); i != e; ++i)
+ if (!isprint(static_cast<unsigned char>(Blob[i]))) {
+ BlobIsPrintable = false;
+ break;
+ }
+
+ if (BlobIsPrintable)
+ outs() << "'" << Blob << "'";
+ else
+ outs() << "unprintable, " << Blob.size() << " bytes.";
+ }
+
+ outs() << "\n";
+ }
+ }
+}
+
+static void PrintSize(double Bits) {
+ outs() << format("%.2f/%.2fB/%luW", Bits, Bits/8,(unsigned long)(Bits/32));
+}
+static void PrintSize(uint64_t Bits) {
+ outs() << format("%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.
+ std::unique_ptr<MemoryBuffer> MemBuf;
+
+ if (error_code ec =
+ MemoryBuffer::getFileOrSTDIN(InputFilename, 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");
+
+ const unsigned char *BufPtr = (const unsigned char *)MemBuf->getBufferStart();
+ const 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, true))
+ 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");
+
+ unsigned BlockID = Stream.ReadSubBlockID();
+
+ if (ParseBlock(Stream, BlockID, 0))
+ return true;
+ ++NumTopBlocks;
}
+ if (Dump) outs() << "\n\n";
- // If there was an error, print it and stop.
- if ( ErrorMessage.size() ) {
- std::cerr << argv[0] << ": " << ErrorMessage << "\n";
- return 1;
+ uint64_t BufferSizeBits = (EndBufPtr-BufPtr)*CHAR_BIT;
+ // Print a summary of the read file.
+ outs() << "Summary of " << InputFilename << ":\n";
+ outs() << " Total size: ";
+ PrintSize(BufferSizeBits);
+ outs() << "\n";
+ outs() << " Stream type: ";
+ switch (CurStreamType) {
+ case UnknownBitstream: outs() << "unknown\n"; break;
+ case LLVMIRBitstream: outs() << "LLVM IR\n"; break;
}
-
+ outs() << " # Toplevel Blocks: " << NumTopBlocks << "\n";
+ outs() << "\n";
- if (Out != &std::cout) {
- ((std::ofstream*)Out)->close();
- delete Out;
+ // Emit per-block stats.
+ outs() << "Per-block Summary:\n";
+ for (std::map<unsigned, PerBlockIDStats>::iterator I = BlockIDStats.begin(),
+ E = BlockIDStats.end(); I != E; ++I) {
+ outs() << " Block ID #" << I->first;
+ if (const char *BlockName = GetBlockName(I->first, StreamFile))
+ outs() << " (" << BlockName << ")";
+ outs() << ":\n";
+
+ const PerBlockIDStats &Stats = I->second;
+ outs() << " Num Instances: " << Stats.NumInstances << "\n";
+ outs() << " Total Size: ";
+ PrintSize(Stats.NumBits);
+ outs() << "\n";
+ double pct = (Stats.NumBits * 100.0) / BufferSizeBits;
+ outs() << " Percent of file: " << format("%2.4f%%", pct) << "\n";
+ if (Stats.NumInstances > 1) {
+ outs() << " Average Size: ";
+ PrintSize(Stats.NumBits/(double)Stats.NumInstances);
+ outs() << "\n";
+ outs() << " Tot/Avg SubBlocks: " << Stats.NumSubBlocks << "/"
+ << Stats.NumSubBlocks/(double)Stats.NumInstances << "\n";
+ outs() << " Tot/Avg Abbrevs: " << Stats.NumAbbrevs << "/"
+ << Stats.NumAbbrevs/(double)Stats.NumInstances << "\n";
+ outs() << " Tot/Avg Records: " << Stats.NumRecords << "/"
+ << Stats.NumRecords/(double)Stats.NumInstances << "\n";
+ } else {
+ outs() << " Num SubBlocks: " << Stats.NumSubBlocks << "\n";
+ outs() << " Num Abbrevs: " << Stats.NumAbbrevs << "\n";
+ outs() << " Num Records: " << Stats.NumRecords << "\n";
+ }
+ if (Stats.NumRecords) {
+ double pct = (Stats.NumAbbreviatedRecords * 100.0) / Stats.NumRecords;
+ outs() << " Percent Abbrevs: " << format("%2.4f%%", pct) << "\n";
+ }
+ outs() << "\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());
+
+ outs() << "\tRecord Histogram:\n";
+ outs() << "\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];
+
+ outs() << format("\t\t%7d %9lu",
+ RecStats.NumInstances,
+ (unsigned long)RecStats.TotalBits);
+
+ if (RecStats.NumAbbrev)
+ outs() <<
+ format("%7.2f ",
+ (double)RecStats.NumAbbrev/RecStats.NumInstances*100);
+ else
+ outs() << " ";
+
+ if (const char *CodeName =
+ GetCodeName(FreqPairs[i].second, I->first, StreamFile))
+ outs() << CodeName << "\n";
+ else
+ outs() << "UnknownCode" << FreqPairs[i].second << "\n";
+ }
+ outs() << "\n";
+
+ }
}
return 0;
}
-// vim: sw=2
+
+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();
+}
projects / oota-llvm.git / blobdiff