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// 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"
namespace v8 {
namespace internal {
namespace wasm {
enum class WasmBranchHint : uint8_t {
kNoHint = 0,
kUnlikely = 1,
kLikely = 2,
};
class V8_EXPORT_PRIVATE BranchHintMap {
public:
void insert(uint32_t offset, WasmBranchHint hint) {
map_.emplace(offset, hint);
}
WasmBranchHint GetHintFor(uint32_t offset) const {
auto it = map_.find(offset);
if (it == map_.end()) {
return WasmBranchHint::kNoHint;
}
return it->second;
}
private:
std::unordered_map<uint32_t, WasmBranchHint> map_;
};
using BranchHintInfo = std::unordered_map<uint32_t, BranchHintMap>;
} // namespace wasm
} // namespace internal
} // namespace v8
#endif // V8_WASM_BRANCH_HINT_MAP_H_
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