mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-10-31 13:20:59 +00:00
5a08544138
Instead of storing source offsets with each instruction, we now keep them in a side table in Executable. This shrinks each instruction by 8 bytes, further improving locality.
74 lines
1.8 KiB
C++
74 lines
1.8 KiB
C++
/*
|
|
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <LibJS/Bytecode/Executable.h>
|
|
#include <LibJS/Bytecode/Instruction.h>
|
|
#include <LibJS/Bytecode/Op.h>
|
|
|
|
namespace JS::Bytecode {
|
|
|
|
Instruction::Instruction(Type type, size_t length)
|
|
: m_type(type)
|
|
, m_length(length)
|
|
{
|
|
VERIFY(length <= NumericLimits<u32>::max());
|
|
}
|
|
|
|
void Instruction::destroy(Instruction& instruction)
|
|
{
|
|
#define __BYTECODE_OP(op) \
|
|
case Type::op: \
|
|
static_cast<Op::op&>(instruction).~op(); \
|
|
return;
|
|
|
|
switch (instruction.type()) {
|
|
ENUMERATE_BYTECODE_OPS(__BYTECODE_OP)
|
|
default:
|
|
VERIFY_NOT_REACHED();
|
|
}
|
|
|
|
#undef __BYTECODE_OP
|
|
}
|
|
|
|
void Instruction::visit_labels(Function<void(JS::Bytecode::Label&)> visitor)
|
|
{
|
|
#define __BYTECODE_OP(op) \
|
|
case Type::op: \
|
|
static_cast<Op::op&>(*this).visit_labels_impl(move(visitor)); \
|
|
return;
|
|
|
|
switch (type()) {
|
|
ENUMERATE_BYTECODE_OPS(__BYTECODE_OP)
|
|
default:
|
|
VERIFY_NOT_REACHED();
|
|
}
|
|
|
|
#undef __BYTECODE_OP
|
|
}
|
|
|
|
UnrealizedSourceRange InstructionStreamIterator::source_range() const
|
|
{
|
|
VERIFY(m_executable);
|
|
auto record = m_executable->source_map.get(offset()).value();
|
|
return {
|
|
.source_code = m_executable->source_code,
|
|
.start_offset = record.source_start_offset,
|
|
.end_offset = record.source_end_offset,
|
|
};
|
|
}
|
|
|
|
RefPtr<SourceCode> InstructionStreamIterator::source_code() const
|
|
{
|
|
return m_executable ? m_executable->source_code.ptr() : nullptr;
|
|
}
|
|
|
|
Operand::Operand(Register reg)
|
|
: m_type(Type::Register)
|
|
, m_index(reg.index())
|
|
{
|
|
}
|
|
|
|
}
|