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https://github.com/LadybirdBrowser/ladybird.git
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d79438a2a6
Merging registers, constants and locals into single vector means: - Better data locality - No need to check type in Interpreter::get() and Interpreter::set() which are very hot functions Performance improvement is visible in almost all Octane and Kraken tests.
119 lines
2.9 KiB
C++
119 lines
2.9 KiB
C++
/*
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* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibJS/Bytecode/Executable.h>
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#include <LibJS/Bytecode/Instruction.h>
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#include <LibJS/Bytecode/Op.h>
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namespace JS::Bytecode {
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void Instruction::destroy(Instruction& instruction)
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{
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#define __BYTECODE_OP(op) \
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case Type::op: \
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static_cast<Op::op&>(instruction).~op(); \
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return;
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switch (instruction.type()) {
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ENUMERATE_BYTECODE_OPS(__BYTECODE_OP)
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default:
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VERIFY_NOT_REACHED();
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}
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#undef __BYTECODE_OP
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}
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void Instruction::visit_labels(Function<void(JS::Bytecode::Label&)> visitor)
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{
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#define __BYTECODE_OP(op) \
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case Type::op: \
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static_cast<Op::op&>(*this).visit_labels_impl(move(visitor)); \
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return;
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switch (type()) {
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ENUMERATE_BYTECODE_OPS(__BYTECODE_OP)
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default:
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VERIFY_NOT_REACHED();
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}
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#undef __BYTECODE_OP
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}
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void Instruction::visit_operands(Function<void(JS::Bytecode::Operand&)> visitor)
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{
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#define __BYTECODE_OP(op) \
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case Type::op: \
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static_cast<Op::op&>(*this).visit_operands_impl(move(visitor)); \
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return;
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switch (type()) {
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ENUMERATE_BYTECODE_OPS(__BYTECODE_OP)
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default:
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VERIFY_NOT_REACHED();
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}
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#undef __BYTECODE_OP
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}
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template<typename Op>
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concept HasVariableLength = Op::IsVariableLength;
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template<typename Op>
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concept HasFixedLength = !Op::IsVariableLength;
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template<HasVariableLength Op>
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size_t get_length_impl(Op const& op)
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{
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return op.length_impl();
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}
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// Function template for types without a length_impl method
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template<HasFixedLength Op>
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size_t get_length_impl(Op const&)
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{
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return sizeof(Op);
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}
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size_t Instruction::length() const
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{
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#define __BYTECODE_OP(op) \
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case Type::op: { \
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auto& typed_op = static_cast<Op::op const&>(*this); \
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return get_length_impl(typed_op); \
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}
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switch (type()) {
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ENUMERATE_BYTECODE_OPS(__BYTECODE_OP)
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default:
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VERIFY_NOT_REACHED();
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}
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#undef __BYTECODE_OP
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}
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UnrealizedSourceRange InstructionStreamIterator::source_range() const
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{
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VERIFY(m_executable);
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auto record = m_executable->source_map.get(offset()).value();
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return {
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.source_code = m_executable->source_code,
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.start_offset = record.source_start_offset,
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.end_offset = record.source_end_offset,
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};
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}
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RefPtr<SourceCode> InstructionStreamIterator::source_code() const
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{
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return m_executable ? m_executable->source_code.ptr() : nullptr;
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}
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Operand::Operand(Register reg)
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: m_type(Type::Register)
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, m_index(reg.index())
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{
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}
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}
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