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-rw-r--r--contrib/llvm/lib/Analysis/PathProfileVerifier.cpp206
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diff --git a/contrib/llvm/lib/Analysis/PathProfileVerifier.cpp b/contrib/llvm/lib/Analysis/PathProfileVerifier.cpp
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-//===- PathProfileVerifier.cpp --------------------------------*- C++ -*---===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This verifier derives an edge profile file from current path profile
-// information
-//
-//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "path-profile-verifier"
-
-#include "llvm/Analysis/Passes.h"
-#include "llvm/Analysis/PathProfileInfo.h"
-#include "llvm/Analysis/ProfileInfoTypes.h"
-#include "llvm/IR/Module.h"
-#include "llvm/Pass.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/Debug.h"
-#include "llvm/Support/raw_ostream.h"
-#include <stdio.h>
-
-using namespace llvm;
-
-namespace {
- class PathProfileVerifier : public ModulePass {
- private:
- bool runOnModule(Module &M);
-
- public:
- static char ID; // Pass identification, replacement for typeid
- PathProfileVerifier() : ModulePass(ID) {
- initializePathProfileVerifierPass(*PassRegistry::getPassRegistry());
- }
-
-
- virtual const char *getPassName() const {
- return "Path Profiler Verifier";
- }
-
- // The verifier requires the path profile and edge profile.
- virtual void getAnalysisUsage(AnalysisUsage& AU) const;
- };
-}
-
-static cl::opt<std::string>
-EdgeProfileFilename("path-profile-verifier-file",
- cl::init("edgefrompath.llvmprof.out"),
- cl::value_desc("filename"),
- cl::desc("Edge profile file generated by -path-profile-verifier"),
- cl::Hidden);
-
-char PathProfileVerifier::ID = 0;
-INITIALIZE_PASS(PathProfileVerifier, "path-profile-verifier",
- "Compare the path profile derived edge profile against the "
- "edge profile.", true, true)
-
-ModulePass *llvm::createPathProfileVerifierPass() {
- return new PathProfileVerifier();
-}
-
-// The verifier requires the path profile and edge profile.
-void PathProfileVerifier::getAnalysisUsage(AnalysisUsage& AU) const {
- AU.addRequired<PathProfileInfo>();
- AU.addPreserved<PathProfileInfo>();
-}
-
-typedef std::map<unsigned, unsigned> DuplicateToIndexMap;
-typedef std::map<BasicBlock*,DuplicateToIndexMap> BlockToDuplicateMap;
-typedef std::map<BasicBlock*,BlockToDuplicateMap> NestedBlockToIndexMap;
-
-// the verifier iterates through each path to gather the total
-// number of edge frequencies
-bool PathProfileVerifier::runOnModule (Module &M) {
- PathProfileInfo& pathProfileInfo = getAnalysis<PathProfileInfo>();
-
- // setup a data structure to map path edges which index an
- // array of edge counters
- NestedBlockToIndexMap arrayMap;
- unsigned i = 0;
- for (Module::iterator F = M.begin(), E = M.end(); F != E; ++F) {
- if (F->isDeclaration()) continue;
-
- arrayMap[(BasicBlock*)0][F->begin()][0] = i++;
-
- for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
- TerminatorInst *TI = BB->getTerminator();
-
- unsigned duplicate = 0;
- BasicBlock* prev = 0;
- for (unsigned s = 0, e = TI->getNumSuccessors(); s != e;
- prev = TI->getSuccessor(s), ++s) {
- if (prev == TI->getSuccessor(s))
- duplicate++;
- else duplicate = 0;
-
- arrayMap[BB][TI->getSuccessor(s)][duplicate] = i++;
- }
- }
- }
-
- std::vector<unsigned> edgeArray(i);
-
- // iterate through each path and increment the edge counters as needed
- for (Module::iterator F = M.begin(), E = M.end(); F != E; ++F) {
- if (F->isDeclaration()) continue;
-
- pathProfileInfo.setCurrentFunction(F);
-
- DEBUG(dbgs() << "function '" << F->getName() << "' ran "
- << pathProfileInfo.pathsRun()
- << "/" << pathProfileInfo.getPotentialPathCount()
- << " potential paths\n");
-
- for( ProfilePathIterator nextPath = pathProfileInfo.pathBegin(),
- endPath = pathProfileInfo.pathEnd();
- nextPath != endPath; nextPath++ ) {
- ProfilePath* currentPath = nextPath->second;
-
- ProfilePathEdgeVector* pev = currentPath->getPathEdges();
- DEBUG(dbgs () << "path #" << currentPath->getNumber() << ": "
- << currentPath->getCount() << "\n");
- // setup the entry edge (normally path profiling doesn't care about this)
- if (currentPath->getFirstBlockInPath() == &F->getEntryBlock())
- edgeArray[arrayMap[(BasicBlock*)0][currentPath->getFirstBlockInPath()][0]]
- += currentPath->getCount();
-
- for( ProfilePathEdgeIterator nextEdge = pev->begin(),
- endEdge = pev->end(); nextEdge != endEdge; nextEdge++ ) {
- if (nextEdge != pev->begin())
- DEBUG(dbgs() << " :: ");
-
- BasicBlock* source = nextEdge->getSource();
- BasicBlock* target = nextEdge->getTarget();
- unsigned duplicateNumber = nextEdge->getDuplicateNumber();
- DEBUG(dbgs() << source->getName() << " --{" << duplicateNumber
- << "}--> " << target->getName());
-
- // Ensure all the referenced edges exist
- // TODO: make this a separate function
- if( !arrayMap.count(source) ) {
- errs() << " error [" << F->getName() << "()]: source '"
- << source->getName()
- << "' does not exist in the array map.\n";
- } else if( !arrayMap[source].count(target) ) {
- errs() << " error [" << F->getName() << "()]: target '"
- << target->getName()
- << "' does not exist in the array map.\n";
- } else if( !arrayMap[source][target].count(duplicateNumber) ) {
- errs() << " error [" << F->getName() << "()]: edge "
- << source->getName() << " -> " << target->getName()
- << " duplicate number " << duplicateNumber
- << " does not exist in the array map.\n";
- } else {
- edgeArray[arrayMap[source][target][duplicateNumber]]
- += currentPath->getCount();
- }
- }
-
- DEBUG(errs() << "\n");
-
- delete pev;
- }
- }
-
- std::string errorInfo;
- std::string filename = EdgeProfileFilename;
-
- // Open a handle to the file
- FILE* edgeFile = fopen(filename.c_str(),"wb");
-
- if (!edgeFile) {
- errs() << "error: unable to open file '" << filename << "' for output.\n";
- return false;
- }
-
- errs() << "Generating edge profile '" << filename << "' ...\n";
-
- // write argument info
- unsigned type = ArgumentInfo;
- unsigned num = pathProfileInfo.argList.size();
- int zeros = 0;
-
- fwrite(&type,sizeof(unsigned),1,edgeFile);
- fwrite(&num,sizeof(unsigned),1,edgeFile);
- fwrite(pathProfileInfo.argList.c_str(),1,num,edgeFile);
- if (num&3)
- fwrite(&zeros, 1, 4-(num&3), edgeFile);
-
- type = EdgeInfo;
- num = edgeArray.size();
- fwrite(&type,sizeof(unsigned),1,edgeFile);
- fwrite(&num,sizeof(unsigned),1,edgeFile);
-
- // write each edge to the file
- for( std::vector<unsigned>::iterator s = edgeArray.begin(),
- e = edgeArray.end(); s != e; s++)
- fwrite(&*s, sizeof (unsigned), 1, edgeFile);
-
- fclose (edgeFile);
-
- return true;
-}
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