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/*
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Badge.h>
#include <AK/DeprecatedString.h>
#include <LibJS/Forward.h>
namespace JS::Bytecode {
struct UnwindInfo {
Executable const* executable;
BasicBlock const* handler;
BasicBlock const* finalizer;
};
class BasicBlock {
AK_MAKE_NONCOPYABLE(BasicBlock);
public:
static NonnullOwnPtr<BasicBlock> create(DeprecatedString name, size_t size = 4 * KiB);
~BasicBlock();
void seal();
void dump(Executable const&) const;
ReadonlyBytes instruction_stream() const { return ReadonlyBytes { m_buffer, m_buffer_size }; }
size_t size() const { return m_buffer_size; }
void* next_slot() { return m_buffer + m_buffer_size; }
bool can_grow(size_t additional_size) const { return m_buffer_size + additional_size <= m_buffer_capacity; }
void grow(size_t additional_size);
void terminate(Badge<Generator>, Instruction const* terminator) { m_terminator = terminator; }
bool is_terminated() const { return m_terminator != nullptr; }
Instruction const* terminator() const { return m_terminator; }
DeprecatedString const& name() const { return m_name; }
private:
BasicBlock(DeprecatedString name, size_t size);
u8* m_buffer { nullptr };
Instruction const* m_terminator { nullptr };
size_t m_buffer_capacity { 0 };
size_t m_buffer_size { 0 };
DeprecatedString m_name;
};
}
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