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628 lines
23 KiB
C++
628 lines
23 KiB
C++
//===-- llvm-bcanalyzer.cpp - Bitcode Analyzer --------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This tool may be invoked in the following manner:
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// llvm-bcanalyzer [options] - Read LLVM bitcode from stdin
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// llvm-bcanalyzer [options] x.bc - Read LLVM bitcode from the x.bc file
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//
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// Options:
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// --help - Output information about command line switches
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// --dump - Dump low-level bitcode structure in readable format
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//
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// This tool provides analytical information about a bitcode file. It is
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// intended as an aid to developers of bitcode reading and writing software. It
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// produces on std::out a summary of the bitcode file that shows various
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// statistics about the contents of the file. By default this information is
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// detailed and contains information about individual bitcode blocks and the
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// functions in the module.
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// The tool is also able to print a bitcode file in a straight forward text
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// format that shows the containment and relationships of the information in
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// the bitcode file (-dump option).
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/OwningPtr.h"
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#include "llvm/Analysis/Verifier.h"
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#include "llvm/Bitcode/BitstreamReader.h"
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#include "llvm/Bitcode/LLVMBitCodes.h"
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#include "llvm/Bitcode/ReaderWriter.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/PrettyStackTrace.h"
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#include "llvm/Support/Signals.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/Support/system_error.h"
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#include <algorithm>
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#include <map>
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using namespace llvm;
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static cl::opt<std::string>
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InputFilename(cl::Positional, cl::desc("<input bitcode>"), cl::init("-"));
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static cl::opt<bool> Dump("dump", cl::desc("Dump low level bitcode trace"));
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//===----------------------------------------------------------------------===//
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// Bitcode specific analysis.
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//===----------------------------------------------------------------------===//
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static cl::opt<bool> NoHistogram("disable-histogram",
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cl::desc("Do not print per-code histogram"));
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static cl::opt<bool>
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NonSymbolic("non-symbolic",
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cl::desc("Emit numeric info in dump even if"
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" symbolic info is available"));
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namespace {
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/// CurStreamTypeType - A type for CurStreamType
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enum CurStreamTypeType {
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UnknownBitstream,
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LLVMIRBitstream
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};
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}
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/// CurStreamType - If we can sniff the flavor of this stream, we can produce
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/// better dump info.
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static CurStreamTypeType CurStreamType;
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/// GetBlockName - Return a symbolic block name if known, otherwise return
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/// null.
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static const char *GetBlockName(unsigned BlockID,
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const BitstreamReader &StreamFile) {
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// Standard blocks for all bitcode files.
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if (BlockID < bitc::FIRST_APPLICATION_BLOCKID) {
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if (BlockID == bitc::BLOCKINFO_BLOCK_ID)
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return "BLOCKINFO_BLOCK";
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return 0;
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}
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// Check to see if we have a blockinfo record for this block, with a name.
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if (const BitstreamReader::BlockInfo *Info =
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StreamFile.getBlockInfo(BlockID)) {
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if (!Info->Name.empty())
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return Info->Name.c_str();
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}
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if (CurStreamType != LLVMIRBitstream) return 0;
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switch (BlockID) {
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default: return 0;
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case bitc::MODULE_BLOCK_ID: return "MODULE_BLOCK";
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case bitc::PARAMATTR_BLOCK_ID: return "PARAMATTR_BLOCK";
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case bitc::TYPE_BLOCK_ID_NEW: return "TYPE_BLOCK_ID";
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case bitc::CONSTANTS_BLOCK_ID: return "CONSTANTS_BLOCK";
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case bitc::FUNCTION_BLOCK_ID: return "FUNCTION_BLOCK";
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case bitc::VALUE_SYMTAB_BLOCK_ID: return "VALUE_SYMTAB";
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case bitc::METADATA_BLOCK_ID: return "METADATA_BLOCK";
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case bitc::METADATA_ATTACHMENT_ID: return "METADATA_ATTACHMENT_BLOCK";
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case bitc::USELIST_BLOCK_ID: return "USELIST_BLOCK_ID";
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}
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}
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/// GetCodeName - Return a symbolic code name if known, otherwise return
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/// null.
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static const char *GetCodeName(unsigned CodeID, unsigned BlockID,
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const BitstreamReader &StreamFile) {
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// Standard blocks for all bitcode files.
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if (BlockID < bitc::FIRST_APPLICATION_BLOCKID) {
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if (BlockID == bitc::BLOCKINFO_BLOCK_ID) {
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switch (CodeID) {
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default: return 0;
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case bitc::BLOCKINFO_CODE_SETBID: return "SETBID";
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case bitc::BLOCKINFO_CODE_BLOCKNAME: return "BLOCKNAME";
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case bitc::BLOCKINFO_CODE_SETRECORDNAME: return "SETRECORDNAME";
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}
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}
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return 0;
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}
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// Check to see if we have a blockinfo record for this record, with a name.
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if (const BitstreamReader::BlockInfo *Info =
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StreamFile.getBlockInfo(BlockID)) {
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for (unsigned i = 0, e = Info->RecordNames.size(); i != e; ++i)
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if (Info->RecordNames[i].first == CodeID)
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return Info->RecordNames[i].second.c_str();
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}
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if (CurStreamType != LLVMIRBitstream) return 0;
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switch (BlockID) {
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default: return 0;
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case bitc::MODULE_BLOCK_ID:
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switch (CodeID) {
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default: return 0;
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case bitc::MODULE_CODE_VERSION: return "VERSION";
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case bitc::MODULE_CODE_TRIPLE: return "TRIPLE";
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case bitc::MODULE_CODE_DATALAYOUT: return "DATALAYOUT";
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case bitc::MODULE_CODE_ASM: return "ASM";
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case bitc::MODULE_CODE_SECTIONNAME: return "SECTIONNAME";
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case bitc::MODULE_CODE_DEPLIB: return "DEPLIB"; // FIXME: Remove in 4.0
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case bitc::MODULE_CODE_GLOBALVAR: return "GLOBALVAR";
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case bitc::MODULE_CODE_FUNCTION: return "FUNCTION";
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case bitc::MODULE_CODE_ALIAS: return "ALIAS";
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case bitc::MODULE_CODE_PURGEVALS: return "PURGEVALS";
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case bitc::MODULE_CODE_GCNAME: return "GCNAME";
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}
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case bitc::PARAMATTR_BLOCK_ID:
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switch (CodeID) {
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default: return 0;
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case bitc::PARAMATTR_CODE_ENTRY: return "ENTRY";
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}
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case bitc::TYPE_BLOCK_ID_NEW:
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switch (CodeID) {
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default: return 0;
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case bitc::TYPE_CODE_NUMENTRY: return "NUMENTRY";
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case bitc::TYPE_CODE_VOID: return "VOID";
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case bitc::TYPE_CODE_FLOAT: return "FLOAT";
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case bitc::TYPE_CODE_DOUBLE: return "DOUBLE";
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case bitc::TYPE_CODE_LABEL: return "LABEL";
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case bitc::TYPE_CODE_OPAQUE: return "OPAQUE";
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case bitc::TYPE_CODE_INTEGER: return "INTEGER";
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case bitc::TYPE_CODE_POINTER: return "POINTER";
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case bitc::TYPE_CODE_ARRAY: return "ARRAY";
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case bitc::TYPE_CODE_VECTOR: return "VECTOR";
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case bitc::TYPE_CODE_X86_FP80: return "X86_FP80";
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case bitc::TYPE_CODE_FP128: return "FP128";
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case bitc::TYPE_CODE_PPC_FP128: return "PPC_FP128";
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case bitc::TYPE_CODE_METADATA: return "METADATA";
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case bitc::TYPE_CODE_STRUCT_ANON: return "STRUCT_ANON";
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case bitc::TYPE_CODE_STRUCT_NAME: return "STRUCT_NAME";
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case bitc::TYPE_CODE_STRUCT_NAMED: return "STRUCT_NAMED";
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case bitc::TYPE_CODE_FUNCTION: return "FUNCTION";
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}
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case bitc::CONSTANTS_BLOCK_ID:
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switch (CodeID) {
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default: return 0;
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case bitc::CST_CODE_SETTYPE: return "SETTYPE";
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case bitc::CST_CODE_NULL: return "NULL";
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case bitc::CST_CODE_UNDEF: return "UNDEF";
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case bitc::CST_CODE_INTEGER: return "INTEGER";
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case bitc::CST_CODE_WIDE_INTEGER: return "WIDE_INTEGER";
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case bitc::CST_CODE_FLOAT: return "FLOAT";
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case bitc::CST_CODE_AGGREGATE: return "AGGREGATE";
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case bitc::CST_CODE_STRING: return "STRING";
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case bitc::CST_CODE_CSTRING: return "CSTRING";
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case bitc::CST_CODE_CE_BINOP: return "CE_BINOP";
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case bitc::CST_CODE_CE_CAST: return "CE_CAST";
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case bitc::CST_CODE_CE_GEP: return "CE_GEP";
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case bitc::CST_CODE_CE_INBOUNDS_GEP: return "CE_INBOUNDS_GEP";
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case bitc::CST_CODE_CE_SELECT: return "CE_SELECT";
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case bitc::CST_CODE_CE_EXTRACTELT: return "CE_EXTRACTELT";
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case bitc::CST_CODE_CE_INSERTELT: return "CE_INSERTELT";
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case bitc::CST_CODE_CE_SHUFFLEVEC: return "CE_SHUFFLEVEC";
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case bitc::CST_CODE_CE_CMP: return "CE_CMP";
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case bitc::CST_CODE_INLINEASM: return "INLINEASM";
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case bitc::CST_CODE_CE_SHUFVEC_EX: return "CE_SHUFVEC_EX";
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case bitc::CST_CODE_BLOCKADDRESS: return "CST_CODE_BLOCKADDRESS";
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case bitc::CST_CODE_DATA: return "DATA";
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}
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case bitc::FUNCTION_BLOCK_ID:
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switch (CodeID) {
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default: return 0;
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case bitc::FUNC_CODE_DECLAREBLOCKS: return "DECLAREBLOCKS";
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case bitc::FUNC_CODE_INST_BINOP: return "INST_BINOP";
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case bitc::FUNC_CODE_INST_CAST: return "INST_CAST";
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case bitc::FUNC_CODE_INST_GEP: return "INST_GEP";
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case bitc::FUNC_CODE_INST_INBOUNDS_GEP: return "INST_INBOUNDS_GEP";
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case bitc::FUNC_CODE_INST_SELECT: return "INST_SELECT";
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case bitc::FUNC_CODE_INST_EXTRACTELT: return "INST_EXTRACTELT";
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case bitc::FUNC_CODE_INST_INSERTELT: return "INST_INSERTELT";
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case bitc::FUNC_CODE_INST_SHUFFLEVEC: return "INST_SHUFFLEVEC";
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case bitc::FUNC_CODE_INST_CMP: return "INST_CMP";
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case bitc::FUNC_CODE_INST_RET: return "INST_RET";
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case bitc::FUNC_CODE_INST_BR: return "INST_BR";
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case bitc::FUNC_CODE_INST_SWITCH: return "INST_SWITCH";
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case bitc::FUNC_CODE_INST_INVOKE: return "INST_INVOKE";
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case bitc::FUNC_CODE_INST_UNREACHABLE: return "INST_UNREACHABLE";
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case bitc::FUNC_CODE_INST_PHI: return "INST_PHI";
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case bitc::FUNC_CODE_INST_ALLOCA: return "INST_ALLOCA";
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case bitc::FUNC_CODE_INST_LOAD: return "INST_LOAD";
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case bitc::FUNC_CODE_INST_VAARG: return "INST_VAARG";
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case bitc::FUNC_CODE_INST_STORE: return "INST_STORE";
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case bitc::FUNC_CODE_INST_EXTRACTVAL: return "INST_EXTRACTVAL";
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case bitc::FUNC_CODE_INST_INSERTVAL: return "INST_INSERTVAL";
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case bitc::FUNC_CODE_INST_CMP2: return "INST_CMP2";
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case bitc::FUNC_CODE_INST_VSELECT: return "INST_VSELECT";
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case bitc::FUNC_CODE_DEBUG_LOC_AGAIN: return "DEBUG_LOC_AGAIN";
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case bitc::FUNC_CODE_INST_CALL: return "INST_CALL";
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case bitc::FUNC_CODE_DEBUG_LOC: return "DEBUG_LOC";
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}
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case bitc::VALUE_SYMTAB_BLOCK_ID:
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switch (CodeID) {
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default: return 0;
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case bitc::VST_CODE_ENTRY: return "ENTRY";
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case bitc::VST_CODE_BBENTRY: return "BBENTRY";
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}
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case bitc::METADATA_ATTACHMENT_ID:
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switch(CodeID) {
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default:return 0;
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case bitc::METADATA_ATTACHMENT: return "METADATA_ATTACHMENT";
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}
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case bitc::METADATA_BLOCK_ID:
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switch(CodeID) {
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default:return 0;
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case bitc::METADATA_STRING: return "METADATA_STRING";
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case bitc::METADATA_NAME: return "METADATA_NAME";
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case bitc::METADATA_KIND: return "METADATA_KIND";
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case bitc::METADATA_NODE: return "METADATA_NODE";
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case bitc::METADATA_FN_NODE: return "METADATA_FN_NODE";
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case bitc::METADATA_NAMED_NODE: return "METADATA_NAMED_NODE";
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}
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case bitc::USELIST_BLOCK_ID:
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switch(CodeID) {
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default:return 0;
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case bitc::USELIST_CODE_ENTRY: return "USELIST_CODE_ENTRY";
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}
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}
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}
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struct PerRecordStats {
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unsigned NumInstances;
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unsigned NumAbbrev;
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uint64_t TotalBits;
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PerRecordStats() : NumInstances(0), NumAbbrev(0), TotalBits(0) {}
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};
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struct PerBlockIDStats {
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/// NumInstances - This the number of times this block ID has been seen.
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unsigned NumInstances;
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/// NumBits - The total size in bits of all of these blocks.
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uint64_t NumBits;
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/// NumSubBlocks - The total number of blocks these blocks contain.
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unsigned NumSubBlocks;
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/// NumAbbrevs - The total number of abbreviations.
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unsigned NumAbbrevs;
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/// NumRecords - The total number of records these blocks contain, and the
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/// number that are abbreviated.
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unsigned NumRecords, NumAbbreviatedRecords;
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/// CodeFreq - Keep track of the number of times we see each code.
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std::vector<PerRecordStats> CodeFreq;
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PerBlockIDStats()
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: NumInstances(0), NumBits(0),
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NumSubBlocks(0), NumAbbrevs(0), NumRecords(0), NumAbbreviatedRecords(0) {}
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};
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static std::map<unsigned, PerBlockIDStats> BlockIDStats;
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/// Error - All bitcode analysis errors go through this function, making this a
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/// good place to breakpoint if debugging.
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static bool Error(const std::string &Err) {
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errs() << Err << "\n";
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return true;
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}
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/// ParseBlock - Read a block, updating statistics, etc.
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static bool ParseBlock(BitstreamCursor &Stream, unsigned IndentLevel) {
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std::string Indent(IndentLevel*2, ' ');
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uint64_t BlockBitStart = Stream.GetCurrentBitNo();
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unsigned BlockID = Stream.ReadSubBlockID();
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// Get the statistics for this BlockID.
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PerBlockIDStats &BlockStats = BlockIDStats[BlockID];
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BlockStats.NumInstances++;
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// BLOCKINFO is a special part of the stream.
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if (BlockID == bitc::BLOCKINFO_BLOCK_ID) {
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if (Dump) outs() << Indent << "<BLOCKINFO_BLOCK/>\n";
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if (Stream.ReadBlockInfoBlock())
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return Error("Malformed BlockInfoBlock");
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uint64_t BlockBitEnd = Stream.GetCurrentBitNo();
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BlockStats.NumBits += BlockBitEnd-BlockBitStart;
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return false;
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}
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unsigned NumWords = 0;
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if (Stream.EnterSubBlock(BlockID, &NumWords))
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return Error("Malformed block record");
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const char *BlockName = 0;
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if (Dump) {
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outs() << Indent << "<";
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if ((BlockName = GetBlockName(BlockID, *Stream.getBitStreamReader())))
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outs() << BlockName;
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else
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outs() << "UnknownBlock" << BlockID;
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if (NonSymbolic && BlockName)
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outs() << " BlockID=" << BlockID;
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outs() << " NumWords=" << NumWords
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<< " BlockCodeSize=" << Stream.getAbbrevIDWidth() << ">\n";
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}
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SmallVector<uint64_t, 64> Record;
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// Read all the records for this block.
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while (1) {
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if (Stream.AtEndOfStream())
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return Error("Premature end of bitstream");
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uint64_t RecordStartBit = Stream.GetCurrentBitNo();
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// Read the code for this record.
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unsigned AbbrevID = Stream.ReadCode();
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switch (AbbrevID) {
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case bitc::END_BLOCK: {
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if (Stream.ReadBlockEnd())
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return Error("Error at end of block");
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uint64_t BlockBitEnd = Stream.GetCurrentBitNo();
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BlockStats.NumBits += BlockBitEnd-BlockBitStart;
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if (Dump) {
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outs() << Indent << "</";
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if (BlockName)
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outs() << BlockName << ">\n";
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else
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outs() << "UnknownBlock" << BlockID << ">\n";
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}
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return false;
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}
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case bitc::ENTER_SUBBLOCK: {
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uint64_t SubBlockBitStart = Stream.GetCurrentBitNo();
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if (ParseBlock(Stream, IndentLevel+1))
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return true;
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++BlockStats.NumSubBlocks;
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uint64_t SubBlockBitEnd = Stream.GetCurrentBitNo();
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// Don't include subblock sizes in the size of this block.
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BlockBitStart += SubBlockBitEnd-SubBlockBitStart;
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break;
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}
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case bitc::DEFINE_ABBREV:
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Stream.ReadAbbrevRecord();
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++BlockStats.NumAbbrevs;
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break;
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default:
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Record.clear();
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++BlockStats.NumRecords;
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if (AbbrevID != bitc::UNABBREV_RECORD)
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++BlockStats.NumAbbreviatedRecords;
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const char *BlobStart = 0;
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unsigned BlobLen = 0;
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unsigned Code = Stream.ReadRecord(AbbrevID, Record, BlobStart, BlobLen);
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// Increment the # occurrences of this code.
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if (BlockStats.CodeFreq.size() <= Code)
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BlockStats.CodeFreq.resize(Code+1);
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BlockStats.CodeFreq[Code].NumInstances++;
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BlockStats.CodeFreq[Code].TotalBits +=
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Stream.GetCurrentBitNo()-RecordStartBit;
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if (AbbrevID != bitc::UNABBREV_RECORD)
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BlockStats.CodeFreq[Code].NumAbbrev++;
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if (Dump) {
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outs() << Indent << " <";
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if (const char *CodeName =
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GetCodeName(Code, BlockID, *Stream.getBitStreamReader()))
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outs() << CodeName;
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else
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outs() << "UnknownCode" << Code;
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if (NonSymbolic &&
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GetCodeName(Code, BlockID, *Stream.getBitStreamReader()))
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outs() << " codeid=" << Code;
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if (AbbrevID != bitc::UNABBREV_RECORD)
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outs() << " abbrevid=" << AbbrevID;
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for (unsigned i = 0, e = Record.size(); i != e; ++i)
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outs() << " op" << i << "=" << (int64_t)Record[i];
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outs() << "/>";
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if (BlobStart) {
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outs() << " blob data = ";
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bool BlobIsPrintable = true;
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for (unsigned i = 0; i != BlobLen; ++i)
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if (!isprint(BlobStart[i])) {
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BlobIsPrintable = false;
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break;
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}
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if (BlobIsPrintable)
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outs() << "'" << std::string(BlobStart, BlobStart+BlobLen) <<"'";
|
|
else
|
|
outs() << "unprintable, " << BlobLen << " bytes.";
|
|
}
|
|
|
|
outs() << "\n";
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
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.
|
|
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");
|
|
|
|
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");
|
|
|
|
if (ParseBlock(Stream, 0))
|
|
return true;
|
|
++NumTopBlocks;
|
|
}
|
|
|
|
if (Dump) outs() << "\n\n";
|
|
|
|
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";
|
|
|
|
// 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;
|
|
}
|
|
|
|
|
|
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();
|
|
}
|