source: icGREP/icgrep-devel/icgrep/toolchain/object_cache.h @ 5597

Last change on this file since 5597 was 5464, checked in by nmedfort, 2 years ago

Restructuring work for the Driver classes. Start of work to eliminate the memory leaks with the ExecutionEngine?. Replaced custom AlignedMalloc? with backend call to std::aligned_malloc. Salvaged some work on DistributionPass? for reevaluation.

File size: 2.1 KB
Line 
1/*
2 *  Copyright (c) 2017 International Characters.
3 *  This software is licensed to the public under the Open Software License 3.0.
4 *  icgrep is a trademark of International Characters.
5 */
6
7#ifndef OBJECT_CACHE_H
8#define OBJECT_CACHE_H
9
10#include <llvm/ADT/SmallString.h>
11#include <llvm/ExecutionEngine/ObjectCache.h>
12#include <llvm/ADT/StringRef.h>
13#include <boost/container/flat_map.hpp>
14#include <vector>
15#include <string>
16
17namespace llvm { class Module; }
18namespace llvm { class MemoryBuffer; }
19namespace llvm { class MemoryBufferRef; }
20namespace kernel { class Kernel; }
21namespace kernel { class KernelBuilder; }
22
23// The ParabixObjectCache is a two-level cache compatible with the requirements
24// of the LLVM ExecutionEngine as well as the Parabix Kernel builder infrastructure.
25//
26// The ParabixObjectCache allows the ParabixDriver to look up cached modules based on a
27// module stub that contains only the necessary Module ID and signature (loadCachedObjectFile).
28// If found, the module object file is immediately loaded into the cachedObjectMap,
29// and later made available to the ExecutionEngine as needed.  Otherwise, false is
30// return to signal that a cached File is not found.  The ParabixDriver can then
31// apply the necessary kernel builder to build the full module IR before passing
32// it to the ExecutionEngine.
33//
34
35class ParabixObjectCache final : public llvm::ObjectCache {
36    using Path = llvm::SmallString<128>;
37    template <typename K, typename V>
38    using Map = boost::container::flat_map<K, V>;
39    using ModuleCache = Map<std::string, std::unique_ptr<llvm::MemoryBuffer>>;
40public:
41    ParabixObjectCache();
42    ParabixObjectCache(const std::string & dir);
43    bool loadCachedObjectFile(const std::unique_ptr<kernel::KernelBuilder> & idb, kernel::Kernel * const kernel);
44    void notifyObjectCompiled(const llvm::Module *M, llvm::MemoryBufferRef Obj) override;
45    void cleanUpObjectCacheFiles();
46    std::unique_ptr<llvm::MemoryBuffer> getObject(const llvm::Module * M) override;
47protected:
48    static Path getDefaultPath();
49private:
50    ModuleCache     mCachedObject;
51    const Path      mCachePath;
52};
53
54#endif
Note: See TracBrowser for help on using the repository browser.