blob: 8e1d3d4eae804150da790ecc0363d26cecff7ad2 [file] [log] [blame]
// Copyright 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/base/export-template.h"
#include "src/base/functional.h"
#include "src/base/macros.h"
#include "src/zone/zone-containers.h"
namespace v8 {
namespace internal {
// Forward declarations.
class Zone;
template <typename>
class ZoneVector;
namespace compiler {
// Forward declarations.
class Node;
// A cache for nodes based on a key. Useful for implementing canonicalization of
// nodes such as constants, parameters, etc.
template <typename Key, typename Hash = base::hash<Key>,
typename Pred = std::equal_to<Key> >
explicit NodeCache(Zone* zone) : map_(zone) {}
~NodeCache() = default;
NodeCache(const NodeCache&) = delete;
NodeCache& operator=(const NodeCache&) = delete;
// Search for node associated with {key} and return a pointer to a memory
// location in this cache that stores an entry for the key. If the location
// returned by this method contains a non-nullptr node, the caller can use
// that node. Otherwise it is the responsibility of the caller to fill the
// entry with a new node.
Node** Find(Key key) { return &(map_[key]); }
// Appends all nodes from this cache to {nodes}.
void GetCachedNodes(ZoneVector<Node*>* nodes) {
for (const auto& entry : map_) {
if (entry.second) nodes->push_back(entry.second);
ZoneUnorderedMap<Key, Node*, Hash, Pred> map_;
// Various default cache types.
using Int32NodeCache = NodeCache<int32_t>;
using Int64NodeCache = NodeCache<int64_t>;
// All we want is the numeric value of the RelocInfo::Mode enum. We typedef
// below to avoid pulling in assembler.h
using RelocInfoMode = char;
using RelocInt32Key = std::pair<int32_t, RelocInfoMode>;
using RelocInt64Key = std::pair<int64_t, RelocInfoMode>;
using RelocInt32NodeCache = NodeCache<RelocInt32Key>;
using RelocInt64NodeCache = NodeCache<RelocInt64Key>;
using IntPtrNodeCache = Int32NodeCache;
using IntPtrNodeCache = Int64NodeCache;
} // namespace compiler
} // namespace internal
} // namespace v8