mirror of
https://github.com/pjh456/OxideJS.git
synced 2026-10-23 18:21:13 +08:00
261 lines
12 KiB
Rust
261 lines
12 KiB
Rust
use crate::{CompileCtx, Emitter};
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use oxide_ir::inst::Inst;
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use oxide_ir::operand::{LabelId, Operand};
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use oxide_bytecode::module::Constant;
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use oxide_bytecode::opcode::OpCode;
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use oxide_parser::{ChainElement, Expression, LogicalOperator, PropertyKey};
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impl Emitter {
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fn emit_optional_guard(&self, reg: u8, short_label: LabelId, ctx: &mut CompileCtx) -> Result<(), String> {
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let dup_reg = ctx.alloc_reg();
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ctx.inst(Inst::new(OpCode::LOAD_VAR, Operand::Reg(dup_reg as u32), Operand::Reg(reg as u32), Operand::None));
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ctx.inst(Inst::jmp_if_nullish(dup_reg, short_label));
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Ok(())
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}
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fn emit_static_member_get_preserve_base(
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&self, member: &oxide_parser::StaticMemberExpression, short_label: Option<LabelId>, ctx: &mut CompileCtx,
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) -> Result<(u8, u8), String> {
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let obj_reg = self.emit_chainable_expression(&member.object, short_label, ctx)?;
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if member.optional {
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if let Some(label) = short_label {
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self.emit_optional_guard(obj_reg, label, ctx)?;
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}
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}
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let idx = ctx.add_constant(Constant::String(member.property.name.as_str().to_string()));
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let key_reg = ctx.alloc_reg();
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ctx.inst(Inst::load_const(Operand::Reg(key_reg as u32), idx));
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let value_reg = ctx.alloc_reg();
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ctx.inst(Inst::new(OpCode::LOAD_VAR, Operand::Reg(value_reg as u32), Operand::Reg(obj_reg as u32), Operand::None));
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ctx.inst(Inst::ic_get(Operand::Reg(value_reg as u32), Operand::Reg(key_reg as u32)));
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Ok((value_reg, obj_reg))
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}
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fn emit_computed_member_get_preserve_base(
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&self, member: &oxide_parser::ComputedMemberExpression, short_label: Option<LabelId>, ctx: &mut CompileCtx,
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) -> Result<(u8, u8), String> {
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let obj_reg = self.emit_chainable_expression(&member.object, short_label, ctx)?;
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if member.optional {
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if let Some(label) = short_label {
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self.emit_optional_guard(obj_reg, label, ctx)?;
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}
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}
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let key_reg = self.emit_expression(&member.expression, ctx)?;
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let value_reg = ctx.alloc_reg();
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ctx.inst(Inst::new(OpCode::GET_PROP_DYNAMIC, Operand::Reg(obj_reg as u32), Operand::Reg(key_reg as u32), Operand::Reg(value_reg as u32)));
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Ok((value_reg, obj_reg))
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}
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fn emit_chain_call(
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&self, call: &oxide_parser::CallExpression, short_label: Option<LabelId>, ctx: &mut CompileCtx,
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) -> Result<u8, String> {
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let (callee_reg, this_reg) = match &call.callee {
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Expression::StaticMemberExpression(member) => {
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self.emit_static_member_get_preserve_base(member, short_label, ctx)?
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}
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Expression::ComputedMemberExpression(member) => {
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self.emit_computed_member_get_preserve_base(member, short_label, ctx)?
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}
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Expression::PrivateFieldExpression(member) => {
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let obj_reg = self.emit_chainable_expression(&member.object, short_label, ctx)?;
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if member.optional {
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if let Some(label) = short_label {
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self.emit_optional_guard(obj_reg, label, ctx)?;
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}
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}
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let key_reg = self.emit_private_id_reg(member.field.name.as_str(), ctx)?;
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let callee_reg = ctx.alloc_reg();
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ctx.inst(Inst::new(OpCode::GET_PRIVATE, Operand::Reg(callee_reg as u32), Operand::Reg(obj_reg as u32), Operand::Reg(key_reg as u32)));
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(callee_reg, obj_reg)
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}
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_ => {
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let callee_reg = self.emit_chainable_expression(&call.callee, short_label, ctx)?;
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if call.optional {
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if let Some(label) = short_label {
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self.emit_optional_guard(callee_reg, label, ctx)?;
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}
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}
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let this_idx = ctx.add_constant(Constant::Undefined);
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let this_reg = ctx.alloc_reg();
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ctx.inst(Inst::load_const(Operand::Reg(this_reg as u32), this_idx));
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(callee_reg, this_reg)
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}
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};
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if call.optional
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&& matches!(
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&call.callee,
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Expression::StaticMemberExpression(_)
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| Expression::ComputedMemberExpression(_)
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| Expression::PrivateFieldExpression(_)
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)
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{
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if let Some(label) = short_label {
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self.emit_optional_guard(callee_reg, label, ctx)?;
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}
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}
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let mut arg_regs = Vec::new();
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for arg in &call.arguments {
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if let Some(expr) = arg.as_expression() {
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arg_regs.push(self.emit_expression(expr, ctx)?);
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}
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}
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let first_arg_reg = if arg_regs.is_empty() { 0u8 } else { arg_regs[0] };
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let op = match &call.callee {
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Expression::Identifier(ident) if ctx.is_builtin(ident.name.as_str()) => OpCode::CALL_NATIVE,
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_ => OpCode::CALL,
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};
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match op {
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OpCode::CALL => {
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ctx.inst(Inst::call(
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Operand::Reg(callee_reg as u32),
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Operand::Reg(this_reg as u32),
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Operand::Reg(first_arg_reg as u32),
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arg_regs.len() as u8,
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));
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}
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OpCode::CALL_NATIVE => {
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ctx.inst(Inst::call_native(
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Operand::Reg(callee_reg as u32),
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Operand::Reg(this_reg as u32),
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Operand::Reg(first_arg_reg as u32),
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arg_regs.len() as u8,
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));
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}
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_ => unreachable!(),
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}
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let result_reg = ctx.alloc_reg();
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ctx.inst(Inst::new(OpCode::LOAD_VAR, Operand::Reg(result_reg as u32), Operand::None, Operand::None));
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Ok(result_reg)
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}
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fn emit_chainable_expression(
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&self, expr: &Expression, short_label: Option<LabelId>, ctx: &mut CompileCtx,
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) -> Result<u8, String> {
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match expr {
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Expression::StaticMemberExpression(member) => {
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let (value_reg, _) = self.emit_static_member_get_preserve_base(member, short_label, ctx)?;
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Ok(value_reg)
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}
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Expression::ComputedMemberExpression(member) => {
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let (value_reg, _) = self.emit_computed_member_get_preserve_base(member, short_label, ctx)?;
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Ok(value_reg)
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}
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Expression::PrivateFieldExpression(member) => {
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let obj_reg = self.emit_chainable_expression(&member.object, short_label, ctx)?;
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if member.optional {
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if let Some(label) = short_label {
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self.emit_optional_guard(obj_reg, label, ctx)?;
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}
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}
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let key_reg = self.emit_private_id_reg(member.field.name.as_str(), ctx)?;
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let value_reg = ctx.alloc_reg();
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ctx.inst(Inst::new(OpCode::GET_PRIVATE, Operand::Reg(value_reg as u32), Operand::Reg(obj_reg as u32), Operand::Reg(key_reg as u32)));
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Ok(value_reg)
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}
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Expression::CallExpression(call) => self.emit_chain_call(call, short_label, ctx),
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Expression::ChainExpression(chain) => self.emit_chain_element(&chain.expression, short_label, ctx),
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_ => self.emit_expression(expr, ctx),
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}
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}
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pub(crate) fn emit_chain_element(
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&self, element: &ChainElement, short_label: Option<LabelId>, ctx: &mut CompileCtx,
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) -> Result<u8, String> {
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match element {
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ChainElement::StaticMemberExpression(member) => {
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let (value_reg, _) = self.emit_static_member_get_preserve_base(member, short_label, ctx)?;
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Ok(value_reg)
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}
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ChainElement::ComputedMemberExpression(member) => {
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let (value_reg, _) = self.emit_computed_member_get_preserve_base(member, short_label, ctx)?;
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Ok(value_reg)
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}
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ChainElement::PrivateFieldExpression(member) => {
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let obj_reg = self.emit_chainable_expression(&member.object, short_label, ctx)?;
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if member.optional {
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if let Some(label) = short_label {
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self.emit_optional_guard(obj_reg, label, ctx)?;
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}
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}
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let key_reg = self.emit_private_id_reg(member.field.name.as_str(), ctx)?;
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let value_reg = ctx.alloc_reg();
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ctx.inst(Inst::new(OpCode::GET_PRIVATE, Operand::Reg(value_reg as u32), Operand::Reg(obj_reg as u32), Operand::Reg(key_reg as u32)));
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Ok(value_reg)
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}
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ChainElement::CallExpression(call) => self.emit_chain_call(call, short_label, ctx),
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ChainElement::TSNonNullExpression(_) => Err("TS non-null expressions are not supported in JS mode".into()),
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}
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}
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pub(crate) fn emit_logical_assign_test(
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&self, op: LogicalOperator, test_reg: u8, store_label: LabelId, end_label: LabelId, ctx: &mut CompileCtx,
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) -> Result<(), String> {
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match op {
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LogicalOperator::And => ctx.inst(Inst::jmp_if_false(test_reg, end_label)),
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LogicalOperator::Or => ctx.inst(Inst::jmp_if_true(test_reg, end_label)),
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LogicalOperator::Coalesce => {
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ctx.inst(Inst::jmp_if_nullish(test_reg, store_label));
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ctx.inst(Inst::jmp(end_label));
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}
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}
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Ok(())
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}
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pub(crate) fn emit_object_property_read(&self, src_reg: u8, key: &str, ctx: &mut CompileCtx) -> u8 {
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let prop_reg = ctx.alloc_reg();
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ctx.inst(Inst::new(OpCode::LOAD_VAR, Operand::Reg(prop_reg as u32), Operand::Reg(src_reg as u32), Operand::None));
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let key_idx = ctx.add_constant(Constant::String(key.to_string()));
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let key_reg = ctx.alloc_reg();
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ctx.inst(Inst::load_const(Operand::Reg(key_reg as u32), key_idx));
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ctx.inst(Inst::ic_get(Operand::Reg(prop_reg as u32), Operand::Reg(key_reg as u32)));
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prop_reg
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}
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fn emit_property_key_expression(&self, key: &PropertyKey, ctx: &mut CompileCtx) -> Result<u8, String> {
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match key {
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PropertyKey::Identifier(ident) => {
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let name = ident.name.as_str();
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let var_reg = ctx.lookup_or_builtin(name)?;
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let key_reg = ctx.alloc_reg();
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ctx.inst(Inst::new(OpCode::LOAD_VAR, Operand::Reg(key_reg as u32), Operand::Reg(var_reg as u32), Operand::None));
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Ok(key_reg)
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}
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PropertyKey::StringLiteral(s) => {
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let key_idx = ctx.add_constant(Constant::String(s.value.to_string()));
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let key_reg = ctx.alloc_reg();
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ctx.inst(Inst::load_const(Operand::Reg(key_reg as u32), key_idx));
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Ok(key_reg)
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}
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PropertyKey::NumericLiteral(n) => {
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let key_idx = ctx.add_constant(Constant::Number(n.value));
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let key_reg = ctx.alloc_reg();
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ctx.inst(Inst::load_const(Operand::Reg(key_reg as u32), key_idx));
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Ok(key_reg)
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}
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PropertyKey::StaticIdentifier(ident) => {
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let key_idx = ctx.add_constant(Constant::String(ident.name.as_str().to_string()));
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let key_reg = ctx.alloc_reg();
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ctx.inst(Inst::load_const(Operand::Reg(key_reg as u32), key_idx));
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Ok(key_reg)
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}
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_ => Err("computed destructuring key expression not supported".into()),
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}
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}
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pub(crate) fn emit_object_property_read_key(
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&self, src_reg: u8, key: &PropertyKey, computed: bool, ctx: &mut CompileCtx,
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) -> Result<(u8, Option<String>), String> {
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if !computed {
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let key_name = self.static_property_name(key)?;
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let prop_reg = self.emit_object_property_read(src_reg, &key_name, ctx);
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return Ok((prop_reg, Some(key_name)));
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}
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let prop_reg = ctx.alloc_reg();
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ctx.inst(Inst::new(OpCode::LOAD_VAR, Operand::Reg(prop_reg as u32), Operand::Reg(src_reg as u32), Operand::None));
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let key_reg = self.emit_property_key_expression(key, ctx)?;
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let val_reg = ctx.alloc_reg();
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ctx.inst(Inst::new(OpCode::GET_PROP_DYNAMIC, Operand::Reg(prop_reg as u32), Operand::Reg(key_reg as u32), Operand::Reg(val_reg as u32)));
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Ok((val_reg, None))
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}
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}
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