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Factor profile information loading OUT of llvm-prof into libanalysis

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11316 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-02-11 05:56:07 +00:00
parent af862116df
commit 89cf3939b7
4 changed files with 3 additions and 246 deletions
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2
tools/llvm-prof/Makefile
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@ -9,5 +9,5 @@
LEVEL = ../..
TOOLNAME = llvm-prof
USEDLIBS = bcreader vmcore support.a
USEDLIBS = analysis.a bcreader vmcore support.a
include $(LEVEL)/Makefile.common

179
tools/llvm-prof/ProfileInfo.cpp
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@ -1,179 +0,0 @@
//===- ProfileInfo.cpp - Represents profile information -------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// The ProfileInfo class is used to represent profiling information read in from
// the dump file.
//
//===----------------------------------------------------------------------===//
#include "ProfileInfo.h"
#include "llvm/Module.h"
#include <cstdio>
using namespace llvm;
enum ProfilingType {
ArgumentInfo = 1, // The command line argument block
FunctionInfo = 2, // Function profiling information
BlockInfo = 3, // Block profiling information
};
// ByteSwap - Byteswap 'Var' if 'Really' is true.
//
static inline unsigned ByteSwap(unsigned Var, bool Really) {
if (!Really) return Var;
return ((Var & (255<< 0)) << 24) |
((Var & (255<< 8)) << 8) |
((Var & (255<<16)) >> 8) |
((Var & (255<<24)) >> 24);
}
static void ReadProfilingBlock(const char *ToolName, FILE *F,
bool ShouldByteSwap,
std::vector<unsigned> &Data) {
// Read the number of entries...
unsigned NumEntries;
if (fread(&NumEntries, sizeof(unsigned), 1, F) != 1) {
std::cerr << ToolName << ": data packet truncated!\n";
perror(0);
exit(1);
}
NumEntries = ByteSwap(NumEntries, ShouldByteSwap);
// Read the counts...
std::vector<unsigned> TempSpace(NumEntries);
// Read in the block of data...
if (fread(&TempSpace[0], sizeof(unsigned)*NumEntries, 1, F) != 1) {
std::cerr << ToolName << ": data packet truncated!\n";
perror(0);
exit(1);
}
// Make sure we have enough space...
if (Data.size() < NumEntries)
Data.resize(NumEntries);
// Accumulate the data we just read into the data.
if (!ShouldByteSwap) {
for (unsigned i = 0; i != NumEntries; ++i)
Data[i] += TempSpace[i];
} else {
for (unsigned i = 0; i != NumEntries; ++i)
Data[i] += ByteSwap(TempSpace[i], true);
}
}
// ProfileInfo ctor - Read the specified profiling data file, exiting the
// program if the file is invalid or broken.
//
ProfileInfo::ProfileInfo(const char *ToolName, const std::string &Filename,
Module &TheModule) : M(TheModule) {
FILE *F = fopen(Filename.c_str(), "r");
if (F == 0) {
std::cerr << ToolName << ": Error opening '" << Filename << ": ";
perror(0);
exit(1);
}
// Keep reading packets until we run out of them.
unsigned PacketType;
while (fread(&PacketType, sizeof(unsigned), 1, F) == 1) {
// If the low eight bits of the packet are zero, we must be dealing with an
// endianness mismatch. Byteswap all words read from the profiling
// information.
bool ShouldByteSwap = (char)PacketType == 0;
PacketType = ByteSwap(PacketType, ShouldByteSwap);
switch (PacketType) {
case ArgumentInfo: {
unsigned ArgLength;
if (fread(&ArgLength, sizeof(unsigned), 1, F) != 1) {
std::cerr << ToolName << ": arguments packet truncated!\n";
perror(0);
exit(1);
}
ArgLength = ByteSwap(ArgLength, ShouldByteSwap);
// Read in the arguments...
std::vector<char> Chars(ArgLength+4);
if (ArgLength)
if (fread(&Chars[0], (ArgLength+3) & ~3, 1, F) != 1) {
std::cerr << ToolName << ": arguments packet truncated!\n";
perror(0);
exit(1);
}
CommandLines.push_back(std::string(&Chars[0], &Chars[ArgLength]));
break;
}
case FunctionInfo:
ReadProfilingBlock(ToolName, F, ShouldByteSwap, FunctionCounts);
break;
case BlockInfo:
ReadProfilingBlock(ToolName, F, ShouldByteSwap, BlockCounts);
break;
default:
std::cerr << ToolName << ": Unknown packet type #" << PacketType << "!\n";
exit(1);
}
}
fclose(F);
}
// getFunctionCounts - This method is used by consumers of function counting
// information. If we do not directly have function count information, we
// compute it from other, more refined, types of profile information.
//
void ProfileInfo::getFunctionCounts(std::vector<std::pair<Function*,
unsigned> > &Counts) {
if (FunctionCounts.empty()) {
// Synthesize function frequency information from the number of times their
// entry blocks were executed.
std::vector<std::pair<BasicBlock*, unsigned> > BlockCounts;
getBlockCounts(BlockCounts);
for (unsigned i = 0, e = BlockCounts.size(); i != e; ++i)
if (&BlockCounts[i].first->getParent()->front() == BlockCounts[i].first)
Counts.push_back(std::make_pair(BlockCounts[i].first->getParent(),
BlockCounts[i].second));
return;
}
unsigned Counter = 0;
for (Module::iterator I = M.begin(), E = M.end();
I != E && Counter != FunctionCounts.size(); ++I)
if (!I->isExternal())
Counts.push_back(std::make_pair(I, FunctionCounts[Counter++]));
}
// getBlockCounts - This method is used by consumers of block counting
// information. If we do not directly have block count information, we
// compute it from other, more refined, types of profile information.
//
void ProfileInfo::getBlockCounts(std::vector<std::pair<BasicBlock*,
unsigned> > &Counts) {
if (BlockCounts.empty()) {
std::cerr << "Block counts not available, and no synthesis "
<< "is implemented yet!\n";
return;
}
unsigned Counter = 0;
for (Module::iterator F = M.begin(), E = M.end(); F != E; ++F)
for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
Counts.push_back(std::make_pair(BB, BlockCounts[Counter++]));
if (Counter == BlockCounts.size())
return;
}
}

63
tools/llvm-prof/ProfileInfo.h
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@ -1,63 +0,0 @@
//===- ProfileInfo.h - Represents profile information -----------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// The ProfileInfo class is used to represent profiling information read in from
// the dump file.
//
//===----------------------------------------------------------------------===//
#ifndef PROFILEINFO_H
#define PROFILEINFO_H
#include <vector>
#include <string>
#include <utility>
namespace llvm {
class Module;
class Function;
class BasicBlock;
class ProfileInfo {
Module &M;
std::vector<std::string> CommandLines;
std::vector<unsigned> FunctionCounts;
std::vector<unsigned> BlockCounts;
public:
// ProfileInfo ctor - Read the specified profiling data file, exiting the
// program if the file is invalid or broken.
ProfileInfo(const char *ToolName, const std::string &Filename, Module &M);
unsigned getNumExecutions() const { return CommandLines.size(); }
const std::string &getExecution(unsigned i) const { return CommandLines[i]; }
// getFunctionCounts - This method is used by consumers of function counting
// information. If we do not directly have function count information, we
// compute it from other, more refined, types of profile information.
//
void getFunctionCounts(std::vector<std::pair<Function*, unsigned> > &Counts);
// hasAccurateBlockCounts - Return true if we can synthesize accurate block
// frequency information from whatever we have.
//
bool hasAccurateBlockCounts() const {
return !BlockCounts.empty();
}
// getBlockCounts - This method is used by consumers of block counting
// information. If we do not directly have block count information, we
// compute it from other, more refined, types of profile information.
//
void getBlockCounts(std::vector<std::pair<BasicBlock*, unsigned> > &Counts);
};
} // End llvm namespace
#endif

5
tools/llvm-prof/llvm-prof.cpp
View File

@ -13,12 +13,11 @@
//
//===----------------------------------------------------------------------===//
#include "ProfileInfo.h"
#include "llvm/Module.h"
#include "llvm/Assembly/AsmAnnotationWriter.h"
#include "llvm/Analysis/ProfileInfoLoader.h"
#include "llvm/Bytecode/Reader.h"
#include "Support/CommandLine.h"
#include <iostream>
#include <cstdio>
#include <map>
#include <set>
@ -92,7 +91,7 @@ int main(int argc, char **argv) {
}
// Read the profiling information
ProfileInfo PI(argv[0], ProfileDataFile, *M);
ProfileInfoLoader PI(argv[0], ProfileDataFile, *M);
std::map<const Function *, unsigned> FuncFreqs;
std::map<const BasicBlock*, unsigned> BlockFreqs;