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LibJS: Introduce Builtins

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Builtins are functions that can be detected during bytecode generation
and enable fast-paths in the JIT.
This commit is contained in:
Simon Wanner 2023-11-17 11:48:30 +01:00 • committed by Andreas Kling
parent b9141d85d8
commit 86b85aa68b
13 changed files with 191 additions and 4 deletions
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5
Userland/Libraries/LibJS/Bytecode/ASTCodegen.cpp
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@ -1521,6 +1521,8 @@ Bytecode::CodeGenerationErrorOr<void> CallExpression::generate_bytecode(Bytecode
generator.emit<Bytecode::Op::LoadImmediate>(js_undefined());
generator.emit<Bytecode::Op::Store>(this_reg);
Optional<Bytecode::Builtin> builtin;
if (is<NewExpression>(this)) {
TRY(m_callee->generate_bytecode(generator));
generator.emit<Bytecode::Op::Store>(callee_reg);
@ -1528,6 +1530,7 @@ Bytecode::CodeGenerationErrorOr<void> CallExpression::generate_bytecode(Bytecode
auto& member_expression = static_cast<MemberExpression const&>(*m_callee);
TRY(get_base_and_value_from_member_expression(generator, member_expression, this_reg));
generator.emit<Bytecode::Op::Store>(callee_reg);
builtin = Bytecode::get_builtin(member_expression);
} else if (is<OptionalChain>(*m_callee)) {
auto& optional_chain = static_cast<OptionalChain const&>(*m_callee);
TRY(generate_optional_chain(generator, optional_chain, callee_reg, this_reg));
@ -1581,7 +1584,7 @@ Bytecode::CodeGenerationErrorOr<void> CallExpression::generate_bytecode(Bytecode
generator.emit<Bytecode::Op::Store>(Bytecode::Register { first_argument_reg.value().index() + register_offset });
register_offset += 1;
}
generator.emit<Bytecode::Op::Call>(call_type, callee_reg, this_reg, first_argument_reg.value_or(Bytecode::Register { 0 }), arguments().size(), expression_string_index);
generator.emit<Bytecode::Op::Call>(call_type, callee_reg, this_reg, first_argument_reg.value_or(Bytecode::Register { 0 }), arguments().size(), expression_string_index, builtin);
}
return {};