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feat: 对象方法 super 门加计算型 super 成员加 VM 步序对齐

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彭俊皓
2026-10-10 01:09:06 +00:00
parent b6219188e7
commit c38e91a65a
11 changed files with 459 additions and 137 deletions
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crates/oxide_emit/src/expr/member/mod.rs
+36 -13
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@@ -10,27 +10,43 @@ use oxide_ir::operand::Operand;
use oxide_parser::Expression;
impl Emitter {
/// super 属性读门判定与 this 装载（GetThisBinding）：this 未初始化时
/// 运行期抛 ReferenceError（VM 侧）。返回 this 寄存器。
///
/// 键装载须在本方法之后（规范序：GetThisBinding 先于键表达式求值）。
pub(crate) fn emit_super_this(&self, ctx: &mut CompileCtx) -> Result<u32, String> {
if !ctx.in_instance_method && !ctx.in_static_method && !ctx.in_derived_constructor {
return Err("super property only supported in class methods".into());
}
let this_reg = ctx.alloc_reg();
ctx.inst(Inst::new(OpCode::LOAD_VAR, Operand::Reg(this_reg), Operand::This, Operand::None));
Ok(this_reg)
}
/// super 属性读：给定 this 寄存器与键寄存器，发 `SUPER_GET_PROP` /
/// `SUPER_STATIC_GET_PROP`（GetSuperBase + RequireObjectCoercible +
/// ToPropertyKey + Get 在运行期完成）。返回结果寄存器。
pub(crate) fn emit_super_get(&self, this_reg: u32, key_reg: u32, ctx: &mut CompileCtx) -> u32 {
let result_reg = ctx.alloc_reg();
let op = if ctx.in_static_method {
OpCode::SUPER_STATIC_GET_PROP
} else {
OpCode::SUPER_GET_PROP
};
ctx.inst(Inst::new(op, Operand::Reg(result_reg), Operand::Reg(this_reg), Operand::Reg(key_reg)));
result_reg
}
fn emit_static_member_expression(
&self, member: &oxide_parser::StaticMemberExpression, ctx: &mut CompileCtx,
) -> Result<u32, String> {
if matches!(&member.object, Expression::Super(_)) {
if !ctx.in_instance_method && !ctx.in_static_method && !ctx.in_derived_constructor {
return Err("super property only supported in class methods".into());
}
let this_reg = self.emit_super_this(ctx)?;
let prop_name = member.property.name.as_str();
let idx = ctx.add_constant(Constant::String(prop_name.to_string()));
let key_reg = ctx.alloc_reg();
ctx.inst(Inst::load_const(Operand::Reg(key_reg), idx));
let this_reg = ctx.alloc_reg();
ctx.inst(Inst::new(OpCode::LOAD_VAR, Operand::Reg(this_reg), Operand::This, Operand::None));
let result_reg = ctx.alloc_reg();
let op = if ctx.in_static_method {
OpCode::SUPER_STATIC_GET_PROP
} else {
OpCode::SUPER_GET_PROP
};
ctx.inst(Inst::new(op, Operand::Reg(result_reg), Operand::Reg(this_reg), Operand::Reg(key_reg)));
return Ok(result_reg);
return Ok(self.emit_super_get(this_reg, key_reg, ctx));
}
let obj_reg = self.emit_expression(&member.object, ctx)?;
let prop_name = member.property.name.as_str();
@@ -44,6 +60,13 @@ impl Emitter {
fn emit_computed_member_expression(
&self, member: &oxide_parser::ComputedMemberExpression, ctx: &mut CompileCtx,
) -> Result<u32, String> {
// super['x']：this 先装载（GetThisBinding），键表达式后求值（规范序），
// 后走 super 读。
if matches!(&member.object, Expression::Super(_)) {
let this_reg = self.emit_super_this(ctx)?;
let key_reg = self.emit_expression(&member.expression, ctx)?;
return Ok(self.emit_super_get(this_reg, key_reg, ctx));
}
// 常量字符串键折叠为 IC 静态路径：免去运行期键 interning 与慢路径 ordinary_get。
if let Some(key) = computed_const_key(&member.expression) {
let obj_reg = self.emit_expression(&member.object, ctx)?;