Factor profile information loading OUT of llvm-prof into libanalysis

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11316 91177308-0d34-0410-b5e6-96231b3b80d8

4 files changed, 3 insertions, 246 deletions

diff --git a/tools/llvm-prof/Makefile b/tools/llvm-prof/Makefile
index 4132e11..8c96e2b 100644
--- a/tools/llvm-prof/Makefile
+++ b/tools/llvm-prof/Makefile
@@ -9,5 +9,5 @@
 LEVEL = ../..
 
 TOOLNAME = llvm-prof
-USEDLIBS = bcreader vmcore support.a
+USEDLIBS = analysis.a bcreader vmcore support.a
 include $(LEVEL)/Makefile.common
diff --git a/tools/llvm-prof/ProfileInfo.cpp b/tools/llvm-prof/ProfileInfo.cpp
deleted file mode 100644
index 8786b30..0000000
--- a/tools/llvm-prof/ProfileInfo.cpp
+++ /dev/null
@@ -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;
-    }
-}
diff --git a/tools/llvm-prof/ProfileInfo.h b/tools/llvm-prof/ProfileInfo.h
deleted file mode 100644
index db45001..0000000
--- a/tools/llvm-prof/ProfileInfo.h
+++ /dev/null
@@ -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
diff --git a/tools/llvm-prof/llvm-prof.cpp b/tools/llvm-prof/llvm-prof.cpp
index 438fecf..3c9c390 100644
--- a/tools/llvm-prof/llvm-prof.cpp
+++ b/tools/llvm-prof/llvm-prof.cpp
@@ -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;