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f37063e2a1
By adding static_asserts to prove that all of our generated instruction classes are trivially destructible, we can confidently remove the destructor walk in BasicBlock and save ourselves some unnecessary work.
98 lines
2.4 KiB
C++
98 lines
2.4 KiB
C++
/*
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* Copyright (c) 2021, Andreas Kling <andreas@ladybird.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::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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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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