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LibJS: Move AST bytecode generation virtuals to separate cpp file

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This will hopefully make it a bit more pleasant to edit this, as things
will just get larger and larger.
This commit is contained in:
Andreas Kling 2021-06-04 11:31:13 +02:00
parent 2b9fbd10ed
commit 0553e0b048
Notes: sideshowbarker 2024-07-18 12:42:38 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/0553e0b0488
3 changed files with 91 additions and 78 deletions
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78
Userland/Libraries/LibJS/AST.cpp
View file

@ -13,9 +13,6 @@
#include <AK/TemporaryChange.h>
#include <LibCrypto/BigInt/SignedBigInteger.h>
#include <LibJS/AST.h>
#include <LibJS/Bytecode/Generator.h>
#include <LibJS/Bytecode/Op.h>
#include <LibJS/Bytecode/Register.h>
#include <LibJS/Interpreter.h>
#include <LibJS/Runtime/Accessor.h>
#include <LibJS/Runtime/Array.h>
@ -2237,79 +2234,4 @@ void ScopeNode::add_functions(NonnullRefPtrVector<FunctionDeclaration> functions
m_functions.append(move(functions));
}
Optional<Bytecode::Register> ASTNode::generate_bytecode(Bytecode::Generator&) const
{
dbgln("Missing generate_bytecode()");
TODO();
}
Optional<Bytecode::Register> ScopeNode::generate_bytecode(Bytecode::Generator& generator) const
{
for (auto& child : children()) {
[[maybe_unused]] auto reg = child.generate_bytecode(generator);
}
return {};
}
Optional<Bytecode::Register> ExpressionStatement::generate_bytecode(Bytecode::Generator& generator) const
{
return m_expression->generate_bytecode(generator);
}
Optional<Bytecode::Register> BinaryExpression::generate_bytecode(Bytecode::Generator& generator) const
{
auto lhs_reg = m_lhs->generate_bytecode(generator);
auto rhs_reg = m_rhs->generate_bytecode(generator);
VERIFY(lhs_reg.has_value());
VERIFY(rhs_reg.has_value());
auto dst_reg = generator.allocate_register();
switch (m_op) {
case BinaryOp::Addition:
generator.emit<Bytecode::Op::Add>(dst_reg, *lhs_reg, *rhs_reg);
return dst_reg;
case BinaryOp::Subtraction:
generator.emit<Bytecode::Op::Sub>(dst_reg, *lhs_reg, *rhs_reg);
return dst_reg;
default:
TODO();
}
}
Optional<Bytecode::Register> NumericLiteral::generate_bytecode(Bytecode::Generator& generator) const
{
auto dst = generator.allocate_register();
generator.emit<Bytecode::Op::Load>(dst, m_value);
return dst;
}
Optional<Bytecode::Register> StringLiteral::generate_bytecode(Bytecode::Generator& generator) const
{
auto dst = generator.allocate_register();
generator.emit<Bytecode::Op::NewString>(dst, m_value);
return dst;
}
Optional<Bytecode::Register> Identifier::generate_bytecode(Bytecode::Generator& generator) const
{
auto reg = generator.allocate_register();
generator.emit<Bytecode::Op::GetVariable>(reg, m_string);
return reg;
}
Optional<Bytecode::Register> AssignmentExpression::generate_bytecode(Bytecode::Generator& generator) const
{
if (is<Identifier>(*m_lhs)) {
auto& identifier = static_cast<Identifier const&>(*m_lhs);
auto rhs_reg = m_rhs->generate_bytecode(generator);
VERIFY(rhs_reg.has_value());
generator.emit<Bytecode::Op::SetVariable>(identifier.string(), *rhs_reg);
return rhs_reg;
}
TODO();
}
}

90
Userland/Libraries/LibJS/Bytecode/ASTCodegen.cpp Normal file
View file

@ -0,0 +1,90 @@
/*
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibJS/AST.h>
#include <LibJS/Bytecode/Generator.h>
#include <LibJS/Bytecode/Instruction.h>
#include <LibJS/Bytecode/Op.h>
#include <LibJS/Bytecode/Register.h>
namespace JS {
Optional<Bytecode::Register> ASTNode::generate_bytecode(Bytecode::Generator&) const
{
dbgln("Missing generate_bytecode()");
TODO();
}
Optional<Bytecode::Register> ScopeNode::generate_bytecode(Bytecode::Generator& generator) const
{
for (auto& child : children()) {
[[maybe_unused]] auto reg = child.generate_bytecode(generator);
}
return {};
}
Optional<Bytecode::Register> ExpressionStatement::generate_bytecode(Bytecode::Generator& generator) const
{
return m_expression->generate_bytecode(generator);
}
Optional<Bytecode::Register> BinaryExpression::generate_bytecode(Bytecode::Generator& generator) const
{
auto lhs_reg = m_lhs->generate_bytecode(generator);
auto rhs_reg = m_rhs->generate_bytecode(generator);
VERIFY(lhs_reg.has_value());
VERIFY(rhs_reg.has_value());
auto dst_reg = generator.allocate_register();
switch (m_op) {
case BinaryOp::Addition:
generator.emit<Bytecode::Op::Add>(dst_reg, *lhs_reg, *rhs_reg);
return dst_reg;
case BinaryOp::Subtraction:
generator.emit<Bytecode::Op::Sub>(dst_reg, *lhs_reg, *rhs_reg);
return dst_reg;
default:
TODO();
}
}
Optional<Bytecode::Register> NumericLiteral::generate_bytecode(Bytecode::Generator& generator) const
{
auto dst = generator.allocate_register();
generator.emit<Bytecode::Op::Load>(dst, m_value);
return dst;
}
Optional<Bytecode::Register> StringLiteral::generate_bytecode(Bytecode::Generator& generator) const
{
auto dst = generator.allocate_register();
generator.emit<Bytecode::Op::NewString>(dst, m_value);
return dst;
}
Optional<Bytecode::Register> Identifier::generate_bytecode(Bytecode::Generator& generator) const
{
auto reg = generator.allocate_register();
generator.emit<Bytecode::Op::GetVariable>(reg, m_string);
return reg;
}
Optional<Bytecode::Register> AssignmentExpression::generate_bytecode(Bytecode::Generator& generator) const
{
if (is<Identifier>(*m_lhs)) {
auto& identifier = static_cast<Identifier const&>(*m_lhs);
auto rhs_reg = m_rhs->generate_bytecode(generator);
VERIFY(rhs_reg.has_value());
generator.emit<Bytecode::Op::SetVariable>(identifier.string(), *rhs_reg);
return rhs_reg;
}
TODO();
}
}

1
Userland/Libraries/LibJS/CMakeLists.txt
View file

@ -1,5 +1,6 @@
set(SOURCES
AST.cpp
Bytecode/ASTCodegen.cpp
Bytecode/Block.cpp
Bytecode/Generator.cpp
Bytecode/Instruction.cpp