branch-hint-map.h

Go to the documentation of this file.

// Copyright 2021 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.
 
#ifndef V8_WASM_BRANCH_HINT_MAP_H_
#define V8_WASM_BRANCH_HINT_MAP_H_
 
#include <unordered_map>
 
#include "src/base/macros.h"
#include "src/common/globals.h"
 
namespace v8 {
namespace internal {
 
namespace wasm {
 
class V8_EXPORT_PRIVATE BranchHintMap {
 public:
  void insert(uint32_t offset, BranchHint hint) { map_.emplace(offset, hint); }
 
  BranchHint GetHintFor(uint32_t offset) const {
    auto it = map_.find(offset);
    if (it == map_.end()) {
      return BranchHint::kNone;
    }
    return it->second;
  }
 
  size_t NumHintsForTesting() const { return map_.size(); }
 
 private:
  std::unordered_map<uint32_t, BranchHint> map_;
};
 
using BranchHintInfo = std::unordered_map<uint32_t, BranchHintMap>;
 
}  // namespace wasm
}  // namespace internal
}  // namespace v8
 
#endif  // V8_WASM_BRANCH_HINT_MAP_H_