forked from OSchip/llvm-project
76 lines
2.5 KiB
C++
76 lines
2.5 KiB
C++
//===- ProfileInfoLoaderPass.cpp - LLVM Pass to load profile info ---------===//
|
|
//
|
|
// 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.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements a concrete implementation of profiling information that
|
|
// loads the information from a profile dump file.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Pass.h"
|
|
#include "llvm/Analysis/ProfileInfo.h"
|
|
#include "llvm/Analysis/ProfileInfoLoader.h"
|
|
#include "Support/CommandLine.h"
|
|
using namespace llvm;
|
|
|
|
namespace {
|
|
cl::opt<std::string>
|
|
ProfileInfoFilename("profile-info-file", cl::init("llvmprof.out"),
|
|
cl::value_desc("filename"),
|
|
cl::desc("Profile file loaded by -profile-loader"));
|
|
|
|
class LoaderPass : public Pass, public ProfileInfo {
|
|
std::string Filename;
|
|
std::map<BasicBlock*, unsigned> ExecutionCounts;
|
|
public:
|
|
LoaderPass(const std::string &filename = "")
|
|
: Filename(filename) {
|
|
if (filename.empty()) Filename = ProfileInfoFilename;
|
|
}
|
|
|
|
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
|
|
AU.setPreservesAll();
|
|
}
|
|
|
|
virtual const char *getPassName() const {
|
|
return "Profiling information loader";
|
|
}
|
|
|
|
/// run - Load the profile information from the specified file.
|
|
virtual bool run(Module &M);
|
|
|
|
virtual unsigned getExecutionCount(BasicBlock *BB) {
|
|
std::map<BasicBlock*, unsigned>::iterator I = ExecutionCounts.find(BB);
|
|
return I != ExecutionCounts.end() ? I->second : 0;
|
|
}
|
|
};
|
|
|
|
RegisterOpt<LoaderPass>
|
|
X("profile-loader", "Load profile information from llvmprof.out");
|
|
|
|
RegisterAnalysisGroup<ProfileInfo, LoaderPass> Y;
|
|
} // End of anonymous namespace
|
|
|
|
|
|
/// createProfileLoaderPass - This function returns a Pass that loads the
|
|
/// profiling information for the module from the specified filename, making it
|
|
/// available to the optimizers.
|
|
Pass *llvm::createProfileLoaderPass(const std::string &Filename) {
|
|
return new LoaderPass(Filename);
|
|
}
|
|
|
|
bool LoaderPass::run(Module &M) {
|
|
ProfileInfoLoader PIL("opt", Filename, M);
|
|
if (PIL.hasAccurateBlockCounts()) {
|
|
std::vector<std::pair<BasicBlock*, unsigned> > Counts;
|
|
PIL.getBlockCounts(Counts);
|
|
ExecutionCounts.insert(Counts.begin(), Counts.end());
|
|
}
|
|
return false;
|
|
}
|