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refactor: CompileCtx 状态族迁出 emit.rs 独立成 compile_ctx 模块
This commit is contained in:
@@ -0,0 +1,677 @@
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//! `CompileCtx` 中心状态族：单函数编译上下文与其常量池键、类字段缓冲。
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//!
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//! 执行流字段（insts/registers/constants/labels）平铺在 `CompileCtx` 上，标识符
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//! 绑定与闭包捕获分别下沉到 `SymbolTable` / `captured_bindings`。`assemble_ir`
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//! 组装产出分域组合的 `IRFunction`，由 `oxide_ir::lower` 降为 bytecode。
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use std::collections::{BTreeMap, HashMap, HashSet};
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use oxide_bytecode::module::{Constant, UpvalueCapture};
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use oxide_ir::inst::Inst;
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use oxide_ir::operand::LabelId;
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use oxide_ir::IRFunction;
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use crate::emit::{BUILTIN_GLOBALS, NON_WRITABLE_GLOBAL_BUILTINS};
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use crate::emit_ctx::{LabelCtx, LabelScope, LoopEntry, LoopKind, ScopeCtx};
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use crate::symbol_table::{ScopeKind, SymbolTable};
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use oxide_parser::VariableDeclarationKind;
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pub(crate) struct FieldBuffer {
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pub(crate) insts: Vec<Inst>,
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pub(crate) labels: Vec<(LabelId, usize)>,
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}
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/// 单函数编译上下文：执行流 + 作用域 + 闭包捕获的聚合状态。
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/// 指令、常量池、寄存器分配平铺于此，作用域/绑定见 `ScopeCtx`，跳转见 `LabelCtx`。
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pub struct CompileCtx {
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pub(crate) insts: Vec<Inst>,
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pub(crate) constants: Vec<Constant>,
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constant_map: HashMap<ConstantKey, u16>,
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pub(crate) next_reg: u32,
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pub(crate) max_regs: u32,
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pub(crate) reserved_reg_start: u32,
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pub(crate) labels: LabelCtx,
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pub(crate) scopes: ScopeCtx,
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pub(crate) nested: Vec<IRFunction>,
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/// 外层函数上下文中持有 `this` 的寄存器。
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/// 箭头函数用它捕获词法 `this`；顶层初始化为 254（约定 this 寄存器）。
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pub(crate) enclosing_this_reg: u8,
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pub(crate) in_derived_constructor: bool,
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pub(crate) in_instance_method: bool,
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pub(crate) in_static_method: bool,
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/// 本函数是否为生成器函数体（`function*`），`assemble_ir` 回写到 IR。
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pub(crate) is_generator: bool,
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/// 本函数是否为异步函数体（`async function` / async 箭头），`assemble_ir` 回写到 IR。
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pub(crate) is_async: bool,
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/// 本函数是否为严格模式函数体：自身 directive ‖ 外层严格继承（编译入口设置 +
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/// 嵌套继承，见 compile_function_body_with_field_hooks_gen），`assemble_ir` 回写到 IR。
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pub(crate) is_strict: bool,
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/// 是否为脚本顶层模块（emit_program 的根上下文）。顶层 var/function 声明需
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/// 同步写全局对象属性（脚本环境记录的 var 可经 globalThis 反射）；函数体为 false。
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pub(crate) is_global_scope: bool,
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/// 是否为 REPL 持久模式：脚本顶层 let/const 也写全局对象属性，使跨轮次
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/// 读取（LOAD_GLOBAL）可见变量绑定。仅 `eval_repl` 设置。
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pub(crate) repl_persist: bool,
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/// 是否为 eval 脚本：脚本顶层 var/function 声明落全局对象时属性
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/// configurable:true（普通脚本顶层为 false）。仅动态脚本入口设置。
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pub(crate) is_eval_script: bool,
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/// 源码是否为 `source_escape` 产物（动态编译入口）：正则字面量源文本切片
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/// 的池键形态据此选择（见 [`Emitter::source_encoded`]）。
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pub(crate) source_encoded: bool,
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pub(crate) static_block_this_reg: Option<u8>,
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pub(crate) field_buffer: Option<FieldBuffer>,
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/// 类构造器模块中 `@@field_keys` upvalue 下标（实例字段 computed key 数组）。
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/// 类定义期求值一次存入 cell，构造器经此 upvalue 读取。
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pub(crate) field_keys_uv: Option<u8>,
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/// 类定义期全部 computed key 数组寄存器（方法/静态字段阶段按 slot 读取）。
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pub(crate) class_keys_reg: Option<u32>,
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pub(crate) current_upvalue_captures: Vec<UpvalueCapture>,
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/// 本函数作用域声明的绑定名（参数 + 变量/函数声明，AST 收集，emit 前确定）。
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pub(crate) own_bindings: HashSet<String>,
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/// 本函数形参名集（含解构形参叶子与 rest，编译入口收集）：块级函数名与
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/// 形参同名时不建外层绑定、不求值写回（规范 paramNames 守卫面）。子函数
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/// ctx 为新建，不继承。
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pub(crate) param_names: HashSet<String>,
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/// 块级函数名 web-compat 外层绑定抑制集（形参 ∪ 函数作用域树内词法声明名）：
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/// 抑制集内名字退化为纯块作用域。预声明期定稿，实例化与声明点写回两侧同查。
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pub(crate) block_fn_suppressed: HashSet<String>,
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/// 块入口已物化声明登记表（按块层级压/弹）：块直接子与标签直接子体
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/// 的函数声明在块入口物化闭包后，按 名 → 声明节点 arena 指针 登记。
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/// 声明点据此三分：同节点命中（本声明已入口物化）→ 复用块槽保闭包
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/// 同一；仅同名命中（支臂声明与直接子同名共享块槽）→ 闭包落 fresh
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/// 寄存器只写回外层 var、块槽不动；均未命中 → 执行期自物化入块槽。
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/// 节点指针解析产物 arena 地址，同一编译单元内稳定。
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pub(crate) block_fn_entry_mats: Vec<HashMap<String, *const ()>>,
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/// 本函数被嵌套函数捕获的绑定名 → cell_idx（名字排序分配，稳定跨 run）。
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/// 捕获判断（MAKE_CELL / CELL_GET / CELL_SET）与子函数 upvalue cell_idx 统一查此映射，
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/// 消除符号表时序依赖与 cell 索引错位。
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pub(crate) captured_bindings: BTreeMap<String, u8>,
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/// 顶层已声明 var 名与顶层函数声明名（脚本全局 GDI 提升名）：裸读走全局对象
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/// 属性（LOAD_GLOBAL）、裸写走描述符感知 A 侧写，单一真值不落镜像 cell。
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/// 仅脚本顶层 emit_program 计算，逐层继承给嵌套函数（嵌套函数的局部同名
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/// 遮蔽不属此集，由作用域索引判定）。
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pub(crate) global_tier_names: HashSet<String>,
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/// 本函数从父函数捕获的 const 绑定名：子 ctx 不继承父函数作用域符号表，
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/// 捕获 const 信息随 upvalue 收集一并快照，供 const 写检查（编译期拦截）使用。
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pub(crate) upvalue_const_flags: HashSet<String>,
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/// 未声明标识符读所分配的全局槽寄存器集合：标识符首次读未命中任何作用域时，
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/// `lookup_or_builtin` 按隐式全局登记并记录其寄存器，后续读取据此发射
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/// LOAD_GLOBAL（运行期查 global object 属性，缺失抛 ReferenceError）。
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/// 按寄存器而非名字记录：块作用域同名新绑定持不同槽位，不会被误判为隐式全局。
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pub(crate) implicit_global_reads: HashSet<u32>,
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/// 未声明标识符写所登记的全局槽寄存器集合：`lookup_or_global` 未命中任何作用域
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/// 时登记全局作用域绑定并记录其寄存器，写调用点据此（经 `is_implicit_global_reg`
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/// 与读集合取并）补全局对象属性写（sloppy）或抛 ReferenceError（strict）。
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/// 子函数 ctx 从父继承——继承绑定命中同一寄存器，补写/抛错判定跨嵌套函数一致。
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pub(crate) implicit_global_writes: HashSet<u32>,
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/// 函数 `length` 属性值：首个带默认值形参之前的形参数（rest 不计）。
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/// emit_params_prologue 前由编译入口从 param_specs 计算。
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pub(crate) function_length: u32,
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pub(crate) const_overflow: bool,
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/// with 语句作用域栈：元素为 (with 对象寄存器, 打开时的作用域深度)。
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/// 非空时 with 体内的自由标识符需动态解析（先查对象属性，回退外层）。
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pub(crate) with_stack: Vec<(u32, usize)>,
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/// 打开中（尚未 emit 对应 END）的 try handler 栈，自底向上镜像运行时
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/// try_stack 组成。每项标记是否为纯 catch handler（TRY_BEGIN，由 TRY_END
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/// 弹出）：return 逃出 try 域时据此弹出栈顶连续纯 catch，防 handler 泄漏。
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pub(crate) open_try_handlers: Vec<bool>,
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/// 循环 update 段中应走寄存器（而非 cell）的被捕获绑定名：C 风格 for 的
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/// let/const 循环变量每迭代 fresh cell，update 写寄存器（不污染本迭代闭包
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/// 捕获的 cell），下一迭代 fresh 从寄存器拷入新 cell。
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pub(crate) register_update_names: Vec<String>,
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/// 模块编译上下文：当前模块命名空间对象寄存器（`__moduleObject` 返回值）。
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pub(crate) module_ns_reg: Option<u32>,
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/// 已求值依赖模块的命名空间对象寄存器（按 import/export source 字符串索引）。
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pub(crate) module_dep_ns_regs: HashMap<String, u32>,
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/// 自导入（import from 自身）的 source 字符串集合：绑定走别名语义，不能链接期快照。
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pub(crate) module_self_import_specs: HashSet<String>,
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/// 自导入别名：导出名 → 本地绑定槽寄存器（export 语句执行时回写绑定值）。
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pub(crate) module_self_aliases: HashMap<String, u32>,
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/// 标签模板 site 计数器：本编译树内全局唯一（子 ctx 继承父值继续递增）。
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/// 运行时与模块 flat_id 组成模板对象缓存键，保证同一编译树同 site 恒返回
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/// 同一对象、不同编译树（eval 每次编译）互不共享。
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pub(crate) next_template_site: u32,
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}
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#[derive(Debug, Clone, PartialEq, Eq, Hash)]
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enum ConstantKey {
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Number(u64),
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Int(i32),
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BigInt(num_bigint::BigInt),
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String(String),
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Boolean(bool),
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Null,
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Undefined,
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}
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impl CompileCtx {
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pub(crate) fn new() -> Self {
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Self {
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insts: Vec::new(),
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constants: Vec::new(),
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constant_map: HashMap::new(),
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next_reg: 1,
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max_regs: 1,
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reserved_reg_start: 1,
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labels: LabelCtx {
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label_pos: Vec::new(),
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loop_stack: Vec::new(),
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switch_stack: Vec::new(),
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label_scopes: Vec::new(),
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pending_loop_labels: Vec::new(),
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finally_depth: 0,
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for_of_depth: 0,
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for_in_depth: 0,
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label_counter: 0,
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},
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scopes: ScopeCtx {
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symbols: SymbolTable::new(),
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builtin_reg_map: Vec::new(),
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private_name_map: Vec::new(),
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private_element_kinds: Vec::new(),
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private_brand_id: None,
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next_private_name_id: 1,
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},
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nested: Vec::new(),
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enclosing_this_reg: 254, // conventional this register at top level
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in_derived_constructor: false,
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in_instance_method: false,
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in_static_method: false,
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is_generator: false,
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is_async: false,
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is_strict: false,
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is_global_scope: false,
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repl_persist: false,
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is_eval_script: false,
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source_encoded: false,
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static_block_this_reg: None,
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field_buffer: None,
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field_keys_uv: None,
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class_keys_reg: None,
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current_upvalue_captures: Vec::new(),
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own_bindings: HashSet::new(),
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param_names: HashSet::new(),
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block_fn_suppressed: HashSet::new(),
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block_fn_entry_mats: Vec::new(),
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captured_bindings: BTreeMap::new(),
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global_tier_names: HashSet::new(),
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upvalue_const_flags: HashSet::new(),
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implicit_global_reads: HashSet::new(),
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implicit_global_writes: HashSet::new(),
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function_length: 0,
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const_overflow: false,
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with_stack: Vec::new(),
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open_try_handlers: Vec::new(),
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register_update_names: Vec::new(),
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module_ns_reg: None,
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module_dep_ns_regs: HashMap::new(),
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module_self_import_specs: HashSet::new(),
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module_self_aliases: HashMap::new(),
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next_template_site: 0,
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}
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}
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pub(crate) fn inst(&mut self, inst: Inst) {
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self.insts.push(inst);
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}
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pub(crate) fn alloc_reg(&mut self) -> u32 {
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let r = self.next_reg;
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// vreg 化：寄存器号无上限，RegAlloc 阶段负责压缩到物理域（≤253）。
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// 254/255 是 VM 保留的 this/new.target，vreg 世界允许虚拟号越过它们，
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// 只有 RegAlloc 完成映射后 lower 的物理域检查才相关。
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self.next_reg += 1;
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if self.next_reg > self.max_regs {
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self.max_regs = self.next_reg;
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}
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r
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}
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pub(crate) fn reset_regs(&mut self) {
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self.next_reg = self.builtin_reg_floor().max(self.reserved_reg_start);
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self.labels.label_counter = 0;
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}
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pub(crate) fn reserve_reg(&mut self, reg: u32) {
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let next = reg.wrapping_add(1);
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if self.next_reg <= reg {
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self.next_reg = next;
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}
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if self.max_regs < next {
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self.max_regs = next;
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}
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}
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pub(crate) fn add_constant(&mut self, c: Constant) -> u16 {
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if let Some(key) = ConstantKey::from_constant(&c) {
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if let Some(&idx) = self.constant_map.get(&key) {
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return idx;
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}
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if self.constants.len() >= u16::MAX as usize {
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self.const_overflow = true;
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return u16::MAX;
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}
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let idx = self.constants.len() as u16;
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self.constants.push(c);
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self.constant_map.insert(key, idx);
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return idx;
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}
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let idx = self.constants.len();
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if idx >= u16::MAX as usize {
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self.const_overflow = true;
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return u16::MAX;
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}
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self.constants.push(c);
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idx as u16
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}
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pub(crate) fn push_scope(&mut self) {
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self.scopes.symbols.push_scope();
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}
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pub(crate) fn pop_scope(&mut self) {
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self.scopes.symbols.pop_scope();
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}
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pub(crate) fn declare(
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&mut self, name: &str, reg: u32, kind: VariableDeclarationKind, is_const: bool,
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) -> Result<(), String> {
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self.scopes.symbols.declare(name, reg, kind, is_const)
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}
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pub(crate) fn declare_initialized(
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&mut self, name: &str, reg: u32, kind: VariableDeclarationKind, is_const: bool,
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) -> Result<(), String> {
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self.scopes.symbols.declare_initialized(name, reg, kind, is_const)
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}
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pub(crate) fn declare_predeclared(
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&mut self, name: &str, reg: u32, kind: VariableDeclarationKind, is_const: bool,
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) -> Result<(), String> {
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self.scopes.symbols.declare_predeclared(name, reg, kind, is_const)
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}
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pub(crate) fn push_scope_with_kind(&mut self, kind: ScopeKind) {
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self.scopes.symbols.push_scope_with_kind(kind);
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}
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pub(crate) fn lookup(&self, name: &str) -> Result<u32, String> {
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self.scopes.symbols.lookup(name)
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}
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pub(crate) fn lookup_or_builtin(&mut self, name: &str) -> Result<u32, String> {
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match self.scopes.symbols.lookup(name) {
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Ok(reg) => Ok(reg),
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// 未声明标识符按隐式全局登记：读取语义（读未声明应抛 ReferenceError）由
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// 发射端按 implicit_global_reads 择 LOAD_GLOBAL 实现；`typeof X` 守卫等
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// 合法 JS 在运行期判定未定义（typeof 特判走 LOAD_GLOBAL_TYPEOF）。
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Err(err) if err.contains("is not defined") => {
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let reg = self.alloc_reg();
|
||||
self.scopes.symbols.pre_register_global(name, reg);
|
||||
self.scopes.builtin_reg_map.push((name.to_string(), reg));
|
||||
// 内置名（预扫描阶段在空符号表上登记）不是用户未声明读，不标记——
|
||||
// 否则内置标识符读取全部改走 LOAD_GLOBAL（热路径退化 + 槽位被修剪）。
|
||||
if !Self::is_known_builtin(name) {
|
||||
self.implicit_global_reads.insert(reg);
|
||||
}
|
||||
Ok(reg)
|
||||
}
|
||||
Err(err) => Err(err),
|
||||
}
|
||||
}
|
||||
|
||||
pub(crate) fn lookup_or_global(&mut self, name: &str) -> u32 {
|
||||
if let Some(reg) = self.scopes.symbols.lookup_any(name) {
|
||||
return reg;
|
||||
}
|
||||
let reg = self.alloc_reg();
|
||||
// 未声明标识符写：登记全局作用域绑定，记录寄存器供写调用点补全局对象属性
|
||||
// 写（sloppy）或抛 ReferenceError（strict）。
|
||||
self.implicit_global_writes.insert(reg);
|
||||
self.scopes.symbols.lookup_or_global(name, reg)
|
||||
}
|
||||
|
||||
/// 寄存器是否承载未声明标识符的全局槽（写调用点据此补全局对象属性写或抛
|
||||
/// ReferenceError）。读写两个登记集合取并：未声明名谁先引用谁登记，读侧登记
|
||||
/// （LOAD_GLOBAL 槽）与写侧登记同属一个全局槽，写都必须穿透到全局对象。
|
||||
pub(crate) fn is_implicit_global_reg(&self, reg: u32) -> bool {
|
||||
self.implicit_global_writes.contains(®) || self.implicit_global_reads.contains(®)
|
||||
}
|
||||
|
||||
pub(crate) fn lookup_const_flag(&self, name: &str) -> bool {
|
||||
// upvalue 捕获的 const：子 ctx 符号表不含父函数作用域绑定，查快照标志。
|
||||
self.scopes.symbols.lookup_is_const(name) || self.upvalue_const_flags.contains(name)
|
||||
}
|
||||
|
||||
pub(crate) fn init_var(&mut self, name: &str) {
|
||||
self.scopes.symbols.init_var(name);
|
||||
}
|
||||
|
||||
pub(crate) fn next_label_id(&mut self) -> u32 {
|
||||
let id = self.labels.label_counter;
|
||||
self.labels.label_counter += 1;
|
||||
id
|
||||
}
|
||||
|
||||
pub(crate) fn push_loop(&mut self, break_label: LabelId, continue_label: LabelId, kind: LoopKind) {
|
||||
let fd = self.labels.finally_depth;
|
||||
// 深度计数先递增再快照：条目记录"打开后（含自身）"的深度，与
|
||||
// take_pending_loop_labels 的标签作用域快照一致，逃出计数才能对齐。
|
||||
if kind.is_for_of() {
|
||||
self.labels.for_of_depth += 1;
|
||||
}
|
||||
if kind.is_for_in() {
|
||||
self.labels.for_in_depth += 1;
|
||||
}
|
||||
let fod = self.labels.for_of_depth;
|
||||
let fid = self.labels.for_in_depth;
|
||||
self.labels.loop_stack.push(LoopEntry {
|
||||
break_label,
|
||||
continue_label,
|
||||
finally_depth_at_open: fd,
|
||||
for_of_depth_at_open: fod,
|
||||
for_in_depth_at_open: fid,
|
||||
kind,
|
||||
});
|
||||
}
|
||||
|
||||
pub(crate) fn pop_loop(&mut self) {
|
||||
if let Some(entry) = self.labels.loop_stack.pop() {
|
||||
if entry.kind.is_for_of() {
|
||||
self.labels.for_of_depth -= 1;
|
||||
}
|
||||
if entry.kind.is_for_in() {
|
||||
self.labels.for_in_depth -= 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub(crate) fn current_loop(&self) -> Option<&LoopEntry> {
|
||||
self.labels.loop_stack.last()
|
||||
}
|
||||
|
||||
pub(crate) fn push_switch(&mut self, break_label: LabelId) {
|
||||
let fd = self.labels.finally_depth;
|
||||
let fod = self.labels.for_of_depth;
|
||||
let fid = self.labels.for_in_depth;
|
||||
self.labels.switch_stack.push((break_label, fd, fod, fid));
|
||||
}
|
||||
|
||||
pub(crate) fn pop_switch(&mut self) {
|
||||
self.labels.switch_stack.pop();
|
||||
}
|
||||
|
||||
pub(crate) fn current_switch(&self) -> Option<&(LabelId, usize, usize, usize)> {
|
||||
self.labels.switch_stack.last()
|
||||
}
|
||||
|
||||
/// 进入/离开一个 try/finally 域：break/continue 跨越 finally 计数用。
|
||||
pub(crate) fn push_finally_domain(&mut self) {
|
||||
self.labels.finally_depth += 1;
|
||||
}
|
||||
|
||||
pub(crate) fn pop_finally_domain(&mut self) {
|
||||
self.labels.finally_depth -= 1;
|
||||
}
|
||||
|
||||
/// 记录一个纯 catch handler 打开（对应 emit try_begin 后的运行时 TRY_BEGIN）。
|
||||
pub(crate) fn push_open_catch_handler(&mut self) {
|
||||
self.open_try_handlers.push(true);
|
||||
}
|
||||
|
||||
/// 记录一个 finally handler 打开（对应 emit try_finally_begin 后的运行时
|
||||
/// TRY_FINALLY_BEGIN）。
|
||||
pub(crate) fn push_open_finally_handler(&mut self) {
|
||||
self.open_try_handlers.push(false);
|
||||
}
|
||||
|
||||
/// 弹出最近打开的 handler（对应 emit 的 TRY_END / TRY_FINALLY_END）。
|
||||
pub(crate) fn pop_open_try_handler(&mut self) {
|
||||
self.open_try_handlers.pop();
|
||||
}
|
||||
|
||||
/// 栈顶连续打开的纯 catch handler 数（遇 finally handler 即停）。
|
||||
/// return 逃出本函数时，这些 handler 可由 TRY_END 直接从栈顶弹出；
|
||||
/// finally 之下的 catch 无法经 TRY_END 弹出，交给运行时统一清理。
|
||||
pub(crate) fn top_open_catch_handlers(&self) -> usize {
|
||||
self.open_try_handlers.iter().rev().take_while(|&&is_catch| is_catch).count()
|
||||
}
|
||||
|
||||
pub(crate) fn push_label_scope(
|
||||
&mut self, name: &str, break_label: LabelId, continue_label: Option<LabelId>,
|
||||
) -> Result<(), String> {
|
||||
if self.labels.label_scopes.iter().any(|s| s.name == name) {
|
||||
return Err(format!("SyntaxError: Label '{name}' has already been declared"));
|
||||
}
|
||||
let fd = self.labels.finally_depth;
|
||||
let fod = self.labels.for_of_depth;
|
||||
let fid = self.labels.for_in_depth;
|
||||
self.labels.label_scopes.push(LabelScope {
|
||||
name: name.to_string(),
|
||||
break_label,
|
||||
continue_label,
|
||||
finally_depth_at_open: fd,
|
||||
for_of_depth_at_open: fod,
|
||||
for_in_depth_at_open: fid,
|
||||
});
|
||||
Ok(())
|
||||
}
|
||||
|
||||
pub(crate) fn pop_label_scope(&mut self) {
|
||||
self.labels.label_scopes.pop();
|
||||
}
|
||||
|
||||
pub(crate) fn find_label(&self, name: &str) -> Option<&LabelScope> {
|
||||
self.labels.label_scopes.iter().rev().find(|s| s.name == name)
|
||||
}
|
||||
|
||||
/// 登记一个待绑定标签名：该标签将作为下一个 emit 的循环（标签语句体）的
|
||||
/// continue 目标。活动集合与待绑定集合中出现重名报错。
|
||||
pub(crate) fn queue_loop_label(&mut self, name: &str) -> Result<(), String> {
|
||||
if self.labels.label_scopes.iter().any(|s| s.name == name)
|
||||
|| self.labels.pending_loop_labels.iter().any(|n| n == name)
|
||||
{
|
||||
return Err(format!("SyntaxError: Label '{name}' has already been declared"));
|
||||
}
|
||||
self.labels.pending_loop_labels.push(name.to_string());
|
||||
Ok(())
|
||||
}
|
||||
|
||||
/// 把待绑定标签名落地为活动标签作用域，绑定到本次循环的 break/continue 目标。
|
||||
/// 返回压入的作用域个数（供事后对称弹出）。
|
||||
pub(crate) fn take_pending_loop_labels(&mut self, break_label: LabelId, continue_label: LabelId) -> usize {
|
||||
let names = std::mem::take(&mut self.labels.pending_loop_labels);
|
||||
let count = names.len();
|
||||
let fd = self.labels.finally_depth;
|
||||
let fod = self.labels.for_of_depth;
|
||||
let fid = self.labels.for_in_depth;
|
||||
for name in names {
|
||||
self.labels.label_scopes.push(LabelScope {
|
||||
name,
|
||||
break_label,
|
||||
continue_label: Some(continue_label),
|
||||
finally_depth_at_open: fd,
|
||||
for_of_depth_at_open: fod,
|
||||
for_in_depth_at_open: fid,
|
||||
});
|
||||
}
|
||||
count
|
||||
}
|
||||
|
||||
pub(crate) fn pop_label_scopes(&mut self, n: usize) {
|
||||
for _ in 0..n {
|
||||
self.labels.label_scopes.pop();
|
||||
}
|
||||
}
|
||||
|
||||
pub(crate) fn is_builtin(&self, name: &str) -> bool {
|
||||
self.scopes.builtin_reg_map.iter().any(|(n, _)| n == name)
|
||||
}
|
||||
|
||||
/// 内置名是否被局部声明遮蔽（`var parseInt = ...` 等）。
|
||||
/// builtin_reg_map 记录的是全局内置槽；若该名在静态作用域另有绑定，则调用应解析局部。
|
||||
pub(crate) fn is_local_shadowing_builtin(&self, name: &str) -> bool {
|
||||
if let Some(reg) = self.scopes.symbols.lookup_any(name) {
|
||||
let is_builtin_slot = self.scopes.builtin_reg_map.iter().any(|(n, r)| n == name && *r == reg);
|
||||
return !is_builtin_slot;
|
||||
}
|
||||
false
|
||||
}
|
||||
|
||||
/// 名字是否解析到全局内置槽：builtin_reg_map 登记（预注册镜像槽），或绑定
|
||||
/// 落全局作用域（scope 0，顶层 var 预声明/隐式全局，含继承的全局槽）。局部
|
||||
/// var/let/参数遮蔽同名时解析到局部寄存器/局部作用域，两条件均不命中。
|
||||
fn resolves_to_global_builtin_slot(&self, name: &str, reg: u32) -> bool {
|
||||
if self.scopes.builtin_reg_map.iter().any(|(n, r)| n == name && *r == reg) {
|
||||
return true;
|
||||
}
|
||||
matches!(self.scopes.symbols.lookup_any_binding(name), Some((_, 0)))
|
||||
}
|
||||
|
||||
/// 写目标是否为只读全局内置（undefined/NaN/Infinity 的全局绑定——全局对象上
|
||||
/// 数据属性 {writable:false, configurable:false}，put 永不成功）。名字在只读
|
||||
/// 名单内且解析到全局内置槽；声明臂与赋值臂共用本谓词。
|
||||
pub(crate) fn targets_readonly_builtin(&self, name: &str, reg: u32) -> bool {
|
||||
NON_WRITABLE_GLOBAL_BUILTINS.contains(&name) && self.resolves_to_global_builtin_slot(name, reg)
|
||||
}
|
||||
|
||||
/// 写目标是否为可写全局内置（全局对象上数据属性 {writable:true,
|
||||
/// configurable:true}）。标识符写须双写镜像槽 + 全局对象属性，否则裸读
|
||||
/// （镜像）与 globalThis 反射（属性）失步。
|
||||
pub(crate) fn targets_writable_builtin(&self, name: &str, reg: u32) -> bool {
|
||||
Self::is_writable_builtin_global(name) && self.resolves_to_global_builtin_slot(name, reg)
|
||||
}
|
||||
|
||||
/// 规范可写全局名：BUILTIN_GLOBALS 减只读三常量集——11 个 w:true 函数、
|
||||
/// 48 个构造器/命名空间、globalThis 与宿主名，描述符皆
|
||||
/// {writable:true, enumerable:false, configurable:true}。
|
||||
pub(crate) fn is_writable_builtin_global(name: &str) -> bool {
|
||||
BUILTIN_GLOBALS.contains(&name) && !NON_WRITABLE_GLOBAL_BUILTINS.contains(&name)
|
||||
}
|
||||
|
||||
/// 可删除全局内置名：可写全局名再除宿主名 $262（harness 全局
|
||||
/// {configurable:false}，删除会破坏宿主面）——自只读/可写单一真源派生，
|
||||
/// 不另立名单。余名描述符皆 {writable:true, configurable:true}，delete
|
||||
/// 真删且返 true。
|
||||
pub(crate) fn is_deletable_global_builtin(name: &str) -> bool {
|
||||
Self::is_writable_builtin_global(name) && name != "$262"
|
||||
}
|
||||
|
||||
/// delete 标识符是否解析到可删除的全局内置镜像槽：名可删（上谓词）且预注册
|
||||
/// 镜像槽在册时返回槽寄存器。局部 var/let/参数遮蔽同名时该名不注册镜像槽
|
||||
/// （预扫描解析到局部绑定），不命中；槽值在 run/帧入口由全局属性预载。
|
||||
pub(crate) fn global_builtin_delete_slot(&self, name: &str) -> Option<u32> {
|
||||
if !Self::is_deletable_global_builtin(name) {
|
||||
return None;
|
||||
}
|
||||
self.scopes.builtin_reg_map.iter().find(|(n, _)| n == name).map(|(_, r)| *r)
|
||||
}
|
||||
|
||||
pub(crate) fn is_known_builtin(name: &str) -> bool {
|
||||
BUILTIN_GLOBALS.contains(&name)
|
||||
}
|
||||
|
||||
/// 规范不可声明的全局名：只读三常量（全局对象上数据属性
|
||||
/// {writable:false, configurable:false}）——顶层块级函数名仅这一面不建
|
||||
/// 外层绑定、不求值写回（sloppy put 永不成功，跳过与执行等价）；其余
|
||||
/// 已知 builtin（parseInt 等）属性可配置，可声明（求值期覆写全局属性）。
|
||||
pub(crate) fn is_non_writable_global_builtin(name: &str) -> bool {
|
||||
NON_WRITABLE_GLOBAL_BUILTINS.contains(&name)
|
||||
}
|
||||
|
||||
/// 进入 with 语句体：记录对象寄存器与当前作用域深度，供动态标识符解析。
|
||||
pub(crate) fn push_with(&mut self, obj_reg: u32) {
|
||||
let depth = self.scopes.symbols.scopes.len();
|
||||
self.with_stack.push((obj_reg, depth));
|
||||
}
|
||||
|
||||
/// 离开 with 语句体。
|
||||
pub(crate) fn pop_with(&mut self) {
|
||||
self.with_stack.pop();
|
||||
}
|
||||
|
||||
/// 最内层 with 对象寄存器；无 with 时为 None。
|
||||
pub(crate) fn innermost_with_obj(&self) -> Option<u32> {
|
||||
self.with_stack.last().map(|&(reg, _)| reg)
|
||||
}
|
||||
|
||||
/// 指定名字是否在 with 语句体**内**（with 打开之后的块作用域）声明。
|
||||
/// with 内声明优先于对象属性；with 之前的外层声明被对象遮蔽。
|
||||
pub(crate) fn is_with_internal_binding(&self, name: &str) -> bool {
|
||||
let Some(&(_, depth)) = self.with_stack.last() else {
|
||||
return false;
|
||||
};
|
||||
matches!(self.scopes.symbols.lookup_any_binding(name), Some((_, idx)) if idx >= depth)
|
||||
}
|
||||
|
||||
pub(crate) fn builtin_reg_floor(&self) -> u32 {
|
||||
self.scopes
|
||||
.builtin_reg_map
|
||||
.iter()
|
||||
.map(|(_, reg)| reg.saturating_add(1))
|
||||
.max()
|
||||
.unwrap_or(0)
|
||||
}
|
||||
|
||||
/// 组装 IRFunction（两出口共用），take 走编译产物状态。
|
||||
/// `parent_ctx` 用于补全 upvalue_captures 的 enclosing_reg（父符号表在父 emit 完成后完整）。
|
||||
pub(crate) fn assemble_ir(
|
||||
&mut self, param_layout: oxide_ir::ParamLayout, parent_ctx: Option<&CompileCtx>,
|
||||
) -> IRFunction {
|
||||
let upvalue_captures = self
|
||||
.current_upvalue_captures
|
||||
.iter()
|
||||
.map(|u| {
|
||||
let enclosing_reg = parent_ctx
|
||||
.and_then(|p| p.scopes.symbols.lookup_any(u.name.as_str()))
|
||||
.unwrap_or(0);
|
||||
UpvalueCapture {
|
||||
name: u.name.clone(),
|
||||
enclosing_reg,
|
||||
cell_idx: u.cell_idx,
|
||||
parent_uv_idx: u.parent_uv_idx,
|
||||
}
|
||||
})
|
||||
.collect();
|
||||
IRFunction {
|
||||
insts: std::mem::take(&mut self.insts),
|
||||
label_pos: std::mem::take(&mut self.labels.label_pos),
|
||||
label_count: self.labels.label_counter,
|
||||
constants: std::mem::take(&mut self.constants),
|
||||
param_layout,
|
||||
builtin_reg_map: std::mem::take(&mut self.scopes.builtin_reg_map),
|
||||
upvalue_captures,
|
||||
cells_needed: self.captured_bindings.len() as u8,
|
||||
n_registers: self.max_regs,
|
||||
is_arrow: false,
|
||||
is_class_constructor: false,
|
||||
is_derived_constructor: false,
|
||||
needs_home_object: false,
|
||||
is_generator: self.is_generator,
|
||||
is_async: self.is_async,
|
||||
is_strict: self.is_strict,
|
||||
captured_this_const_idx: 0,
|
||||
function_name: None,
|
||||
function_length: self.function_length,
|
||||
is_top_level: parent_ctx.is_none(),
|
||||
const_overflow: self.const_overflow,
|
||||
nested: std::mem::take(&mut self.nested),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl ConstantKey {
|
||||
fn from_constant(value: &Constant) -> Option<Self> {
|
||||
match value {
|
||||
Constant::Number(v) => Some(Self::Number(v.to_bits())),
|
||||
Constant::Int(v) => Some(Self::Int(*v)),
|
||||
Constant::BigInt(v) => Some(Self::BigInt(v.clone())),
|
||||
Constant::String(v) => Some(Self::String(v.clone())),
|
||||
Constant::Boolean(v) => Some(Self::Boolean(*v)),
|
||||
Constant::Null => Some(Self::Null),
|
||||
Constant::Undefined => Some(Self::Undefined),
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -1,11 +1,10 @@
|
||||
//! emit：AST → IR 代码生成（parse → IR → bytecode 中段）。
|
||||
//!
|
||||
//! `Emitter` 提供各语法域的 emit_* 方法；核心状态集中在 `CompileCtx`：
|
||||
//! 执行流字段（insts/registers/constants/labels）平铺其上，标识符绑定与
|
||||
//! 闭包捕获分别下沉到 `SymbolTable` / `captured_bindings`。产出分域组合的
|
||||
//! `IRFunction`，由 `oxide_ir::lower` 降为 bytecode。
|
||||
//! `Emitter` 提供各语法域的 emit_* 方法；核心状态集中在 `CompileCtx`
|
||||
//! （见 `compile_ctx.rs`）。产出分域组合的 `IRFunction`，由
|
||||
//! `oxide_ir::lower` 降为 bytecode。
|
||||
|
||||
use std::collections::{BTreeMap, HashMap, HashSet};
|
||||
use std::collections::HashSet;
|
||||
|
||||
use oxide_bytecode::module::UpvalueCapture;
|
||||
use oxide_bytecode::opcode::OpCode;
|
||||
@@ -24,8 +23,8 @@ pub fn is_anonymous_function_definition(expr: &oxide_parser::Expression) -> bool
|
||||
}
|
||||
}
|
||||
|
||||
use crate::emit_ctx::{LabelCtx, LoopEntry, LoopKind, ScopeCtx};
|
||||
use crate::symbol_table::{Binding, ScopeKind, SymbolTable};
|
||||
use crate::compile_ctx::{CompileCtx, FieldBuffer};
|
||||
use crate::symbol_table::{Binding, ScopeKind};
|
||||
|
||||
/// 常量池项（bytecode module 类型）re-export，供调用方构造常量。
|
||||
pub use oxide_bytecode::module::Constant;
|
||||
@@ -74,7 +73,7 @@ pub fn is_side_effect_free(expr: &Expression) -> bool {
|
||||
true
|
||||
}
|
||||
|
||||
const BUILTIN_GLOBALS: &[&str] = &[
|
||||
pub(crate) const BUILTIN_GLOBALS: &[&str] = &[
|
||||
"NaN",
|
||||
"undefined",
|
||||
"Infinity",
|
||||
@@ -147,139 +146,7 @@ const BUILTIN_GLOBALS: &[&str] = &[
|
||||
/// 对它们的 put 永不成功。写路径命中这些名字的全局绑定（非局部遮蔽）时编译期
|
||||
/// 拦截：sloppy 静默丢弃、strict 抛 TypeError；BUILTIN_GLOBALS 内其余名属性可写
|
||||
/// （writable:true），标识符写须双写全局属性（见 targets_writable_builtin）。
|
||||
const NON_WRITABLE_GLOBAL_BUILTINS: &[&str] = &["undefined", "NaN", "Infinity"];
|
||||
|
||||
pub(crate) struct FieldBuffer {
|
||||
pub(crate) insts: Vec<Inst>,
|
||||
pub(crate) labels: Vec<(LabelId, usize)>,
|
||||
}
|
||||
|
||||
/// 标签语句作用域：编译期内登记 `break label` / `continue label` 的跳转目标。
|
||||
/// `continue_label` 仅在标签直接包裹迭代语句时存在。
|
||||
#[derive(Debug, Clone)]
|
||||
pub struct LabelScope {
|
||||
pub(crate) name: String,
|
||||
pub(crate) break_label: LabelId,
|
||||
pub(crate) continue_label: Option<LabelId>,
|
||||
/// 标签打开时嵌套的 finally 域数：break/continue 跨越 finally 的计数依据。
|
||||
pub(crate) finally_depth_at_open: usize,
|
||||
/// 标签打开时已打开的 for-of 循环数：break/continue 逃出计数依据。
|
||||
pub(crate) for_of_depth_at_open: usize,
|
||||
/// 标签打开时已打开的 for-in 循环数。
|
||||
pub(crate) for_in_depth_at_open: usize,
|
||||
}
|
||||
|
||||
/// 单函数编译上下文：执行流 + 作用域 + 闭包捕获的聚合状态。
|
||||
/// 指令、常量池、寄存器分配平铺于此，作用域/绑定见 `ScopeCtx`，跳转见 `LabelCtx`。
|
||||
pub struct CompileCtx {
|
||||
pub(crate) insts: Vec<Inst>,
|
||||
pub(crate) constants: Vec<Constant>,
|
||||
constant_map: HashMap<ConstantKey, u16>,
|
||||
next_reg: u32,
|
||||
pub(crate) max_regs: u32,
|
||||
reserved_reg_start: u32,
|
||||
pub(crate) labels: LabelCtx,
|
||||
pub(crate) scopes: ScopeCtx,
|
||||
pub(crate) nested: Vec<IRFunction>,
|
||||
/// 外层函数上下文中持有 `this` 的寄存器。
|
||||
/// 箭头函数用它捕获词法 `this`；顶层初始化为 254（约定 this 寄存器）。
|
||||
pub(crate) enclosing_this_reg: u8,
|
||||
pub(crate) in_derived_constructor: bool,
|
||||
pub(crate) in_instance_method: bool,
|
||||
pub(crate) in_static_method: bool,
|
||||
/// 本函数是否为生成器函数体（`function*`），`assemble_ir` 回写到 IR。
|
||||
pub(crate) is_generator: bool,
|
||||
/// 本函数是否为异步函数体（`async function` / async 箭头），`assemble_ir` 回写到 IR。
|
||||
pub(crate) is_async: bool,
|
||||
/// 本函数是否为严格模式函数体：自身 directive ‖ 外层严格继承（编译入口设置 +
|
||||
/// 嵌套继承，见 compile_function_body_with_field_hooks_gen），`assemble_ir` 回写到 IR。
|
||||
pub(crate) is_strict: bool,
|
||||
/// 是否为脚本顶层模块（emit_program 的根上下文）。顶层 var/function 声明需
|
||||
/// 同步写全局对象属性（脚本环境记录的 var 可经 globalThis 反射）；函数体为 false。
|
||||
pub(crate) is_global_scope: bool,
|
||||
/// 是否为 REPL 持久模式：脚本顶层 let/const 也写全局对象属性，使跨轮次
|
||||
/// 读取（LOAD_GLOBAL）可见变量绑定。仅 `eval_repl` 设置。
|
||||
pub(crate) repl_persist: bool,
|
||||
/// 是否为 eval 脚本：脚本顶层 var/function 声明落全局对象时属性
|
||||
/// configurable:true（普通脚本顶层为 false）。仅动态脚本入口设置。
|
||||
pub(crate) is_eval_script: bool,
|
||||
/// 源码是否为 `source_escape` 产物（动态编译入口）：正则字面量源文本切片
|
||||
/// 的池键形态据此选择（见 [`Emitter::source_encoded`]）。
|
||||
pub(crate) source_encoded: bool,
|
||||
pub(crate) static_block_this_reg: Option<u8>,
|
||||
pub(crate) field_buffer: Option<FieldBuffer>,
|
||||
/// 类构造器模块中 `@@field_keys` upvalue 下标（实例字段 computed key 数组）。
|
||||
/// 类定义期求值一次存入 cell，构造器经此 upvalue 读取。
|
||||
pub(crate) field_keys_uv: Option<u8>,
|
||||
/// 类定义期全部 computed key 数组寄存器（方法/静态字段阶段按 slot 读取）。
|
||||
pub(crate) class_keys_reg: Option<u32>,
|
||||
pub(crate) current_upvalue_captures: Vec<UpvalueCapture>,
|
||||
/// 本函数作用域声明的绑定名（参数 + 变量/函数声明，AST 收集，emit 前确定）。
|
||||
pub(crate) own_bindings: HashSet<String>,
|
||||
/// 本函数形参名集（含解构形参叶子与 rest，编译入口收集）：块级函数名与
|
||||
/// 形参同名时不建外层绑定、不求值写回（规范 paramNames 守卫面）。子函数
|
||||
/// ctx 为新建，不继承。
|
||||
pub(crate) param_names: HashSet<String>,
|
||||
/// 块级函数名 web-compat 外层绑定抑制集（形参 ∪ 函数作用域树内词法声明名）：
|
||||
/// 抑制集内名字退化为纯块作用域。预声明期定稿，实例化与声明点写回两侧同查。
|
||||
pub(crate) block_fn_suppressed: HashSet<String>,
|
||||
/// 块入口已物化声明登记表（按块层级压/弹）：块直接子与标签直接子体
|
||||
/// 的函数声明在块入口物化闭包后，按 名 → 声明节点 arena 指针 登记。
|
||||
/// 声明点据此三分：同节点命中（本声明已入口物化）→ 复用块槽保闭包
|
||||
/// 同一；仅同名命中（支臂声明与直接子同名共享块槽）→ 闭包落 fresh
|
||||
/// 寄存器只写回外层 var、块槽不动；均未命中 → 执行期自物化入块槽。
|
||||
/// 节点指针解析产物 arena 地址，同一编译单元内稳定。
|
||||
pub(crate) block_fn_entry_mats: Vec<HashMap<String, *const ()>>,
|
||||
/// 本函数被嵌套函数捕获的绑定名 → cell_idx（名字排序分配，稳定跨 run）。
|
||||
/// 捕获判断（MAKE_CELL / CELL_GET / CELL_SET）与子函数 upvalue cell_idx 统一查此映射，
|
||||
/// 消除符号表时序依赖与 cell 索引错位。
|
||||
pub(crate) captured_bindings: BTreeMap<String, u8>,
|
||||
/// 顶层已声明 var 名与顶层函数声明名（脚本全局 GDI 提升名）：裸读走全局对象
|
||||
/// 属性（LOAD_GLOBAL）、裸写走描述符感知 A 侧写，单一真值不落镜像 cell。
|
||||
/// 仅脚本顶层 emit_program 计算，逐层继承给嵌套函数（嵌套函数的局部同名
|
||||
/// 遮蔽不属此集，由作用域索引判定）。
|
||||
pub(crate) global_tier_names: HashSet<String>,
|
||||
/// 本函数从父函数捕获的 const 绑定名：子 ctx 不继承父函数作用域符号表，
|
||||
/// 捕获 const 信息随 upvalue 收集一并快照，供 const 写检查（编译期拦截）使用。
|
||||
pub(crate) upvalue_const_flags: HashSet<String>,
|
||||
/// 未声明标识符读所分配的全局槽寄存器集合：标识符首次读未命中任何作用域时，
|
||||
/// `lookup_or_builtin` 按隐式全局登记并记录其寄存器，后续读取据此发射
|
||||
/// LOAD_GLOBAL（运行期查 global object 属性，缺失抛 ReferenceError）。
|
||||
/// 按寄存器而非名字记录：块作用域同名新绑定持不同槽位，不会被误判为隐式全局。
|
||||
pub(crate) implicit_global_reads: HashSet<u32>,
|
||||
/// 未声明标识符写所登记的全局槽寄存器集合：`lookup_or_global` 未命中任何作用域
|
||||
/// 时登记全局作用域绑定并记录其寄存器，写调用点据此（经 `is_implicit_global_reg`
|
||||
/// 与读集合取并）补全局对象属性写（sloppy）或抛 ReferenceError（strict）。
|
||||
/// 子函数 ctx 从父继承——继承绑定命中同一寄存器，补写/抛错判定跨嵌套函数一致。
|
||||
pub(crate) implicit_global_writes: HashSet<u32>,
|
||||
/// 函数 `length` 属性值：首个带默认值形参之前的形参数（rest 不计）。
|
||||
/// emit_params_prologue 前由编译入口从 param_specs 计算。
|
||||
pub(crate) function_length: u32,
|
||||
pub(crate) const_overflow: bool,
|
||||
/// with 语句作用域栈：元素为 (with 对象寄存器, 打开时的作用域深度)。
|
||||
/// 非空时 with 体内的自由标识符需动态解析（先查对象属性，回退外层）。
|
||||
pub(crate) with_stack: Vec<(u32, usize)>,
|
||||
/// 打开中（尚未 emit 对应 END）的 try handler 栈，自底向上镜像运行时
|
||||
/// try_stack 组成。每项标记是否为纯 catch handler（TRY_BEGIN，由 TRY_END
|
||||
/// 弹出）：return 逃出 try 域时据此弹出栈顶连续纯 catch，防 handler 泄漏。
|
||||
pub(crate) open_try_handlers: Vec<bool>,
|
||||
/// 循环 update 段中应走寄存器（而非 cell）的被捕获绑定名：C 风格 for 的
|
||||
/// let/const 循环变量每迭代 fresh cell，update 写寄存器（不污染本迭代闭包
|
||||
/// 捕获的 cell），下一迭代 fresh 从寄存器拷入新 cell。
|
||||
pub(crate) register_update_names: Vec<String>,
|
||||
/// 模块编译上下文：当前模块命名空间对象寄存器（`__moduleObject` 返回值）。
|
||||
pub(crate) module_ns_reg: Option<u32>,
|
||||
/// 已求值依赖模块的命名空间对象寄存器（按 import/export source 字符串索引）。
|
||||
pub(crate) module_dep_ns_regs: HashMap<String, u32>,
|
||||
/// 自导入（import from 自身）的 source 字符串集合：绑定走别名语义，不能链接期快照。
|
||||
pub(crate) module_self_import_specs: HashSet<String>,
|
||||
/// 自导入别名：导出名 → 本地绑定槽寄存器（export 语句执行时回写绑定值）。
|
||||
pub(crate) module_self_aliases: HashMap<String, u32>,
|
||||
/// 标签模板 site 计数器：本编译树内全局唯一（子 ctx 继承父值继续递增）。
|
||||
/// 运行时与模块 flat_id 组成模板对象缓存键，保证同一编译树同 site 恒返回
|
||||
/// 同一对象、不同编译树（eval 每次编译）互不共享。
|
||||
pub(crate) next_template_site: u32,
|
||||
}
|
||||
pub(crate) const NON_WRITABLE_GLOBAL_BUILTINS: &[&str] = &["undefined", "NaN", "Infinity"];
|
||||
|
||||
/// 函数体编译上下文：决定 `this`/`super` 绑定与参数前导（prologue）形态。
|
||||
#[derive(Clone, Copy)]
|
||||
@@ -319,549 +186,6 @@ impl ParamSpec<'_> {
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
|
||||
enum ConstantKey {
|
||||
Number(u64),
|
||||
Int(i32),
|
||||
BigInt(num_bigint::BigInt),
|
||||
String(String),
|
||||
Boolean(bool),
|
||||
Null,
|
||||
Undefined,
|
||||
}
|
||||
|
||||
impl CompileCtx {
|
||||
pub(crate) fn new() -> Self {
|
||||
Self {
|
||||
insts: Vec::new(),
|
||||
constants: Vec::new(),
|
||||
constant_map: HashMap::new(),
|
||||
next_reg: 1,
|
||||
max_regs: 1,
|
||||
reserved_reg_start: 1,
|
||||
labels: LabelCtx {
|
||||
label_pos: Vec::new(),
|
||||
loop_stack: Vec::new(),
|
||||
switch_stack: Vec::new(),
|
||||
label_scopes: Vec::new(),
|
||||
pending_loop_labels: Vec::new(),
|
||||
finally_depth: 0,
|
||||
for_of_depth: 0,
|
||||
for_in_depth: 0,
|
||||
label_counter: 0,
|
||||
},
|
||||
scopes: ScopeCtx {
|
||||
symbols: SymbolTable::new(),
|
||||
builtin_reg_map: Vec::new(),
|
||||
private_name_map: Vec::new(),
|
||||
private_element_kinds: Vec::new(),
|
||||
private_brand_id: None,
|
||||
next_private_name_id: 1,
|
||||
},
|
||||
nested: Vec::new(),
|
||||
enclosing_this_reg: 254, // conventional this register at top level
|
||||
in_derived_constructor: false,
|
||||
in_instance_method: false,
|
||||
in_static_method: false,
|
||||
is_generator: false,
|
||||
is_async: false,
|
||||
is_strict: false,
|
||||
is_global_scope: false,
|
||||
repl_persist: false,
|
||||
is_eval_script: false,
|
||||
source_encoded: false,
|
||||
static_block_this_reg: None,
|
||||
field_buffer: None,
|
||||
field_keys_uv: None,
|
||||
class_keys_reg: None,
|
||||
current_upvalue_captures: Vec::new(),
|
||||
own_bindings: HashSet::new(),
|
||||
param_names: HashSet::new(),
|
||||
block_fn_suppressed: HashSet::new(),
|
||||
block_fn_entry_mats: Vec::new(),
|
||||
captured_bindings: BTreeMap::new(),
|
||||
global_tier_names: HashSet::new(),
|
||||
upvalue_const_flags: HashSet::new(),
|
||||
implicit_global_reads: HashSet::new(),
|
||||
implicit_global_writes: HashSet::new(),
|
||||
function_length: 0,
|
||||
const_overflow: false,
|
||||
with_stack: Vec::new(),
|
||||
open_try_handlers: Vec::new(),
|
||||
register_update_names: Vec::new(),
|
||||
module_ns_reg: None,
|
||||
module_dep_ns_regs: HashMap::new(),
|
||||
module_self_import_specs: HashSet::new(),
|
||||
module_self_aliases: HashMap::new(),
|
||||
next_template_site: 0,
|
||||
}
|
||||
}
|
||||
|
||||
pub(crate) fn inst(&mut self, inst: Inst) {
|
||||
self.insts.push(inst);
|
||||
}
|
||||
|
||||
pub(crate) fn alloc_reg(&mut self) -> u32 {
|
||||
let r = self.next_reg;
|
||||
// vreg 化：寄存器号无上限，RegAlloc 阶段负责压缩到物理域（≤253）。
|
||||
// 254/255 是 VM 保留的 this/new.target，vreg 世界允许虚拟号越过它们，
|
||||
// 只有 RegAlloc 完成映射后 lower 的物理域检查才相关。
|
||||
self.next_reg += 1;
|
||||
if self.next_reg > self.max_regs {
|
||||
self.max_regs = self.next_reg;
|
||||
}
|
||||
r
|
||||
}
|
||||
|
||||
pub(crate) fn reset_regs(&mut self) {
|
||||
self.next_reg = self.builtin_reg_floor().max(self.reserved_reg_start);
|
||||
self.labels.label_counter = 0;
|
||||
}
|
||||
|
||||
pub(crate) fn reserve_reg(&mut self, reg: u32) {
|
||||
let next = reg.wrapping_add(1);
|
||||
if self.next_reg <= reg {
|
||||
self.next_reg = next;
|
||||
}
|
||||
if self.max_regs < next {
|
||||
self.max_regs = next;
|
||||
}
|
||||
}
|
||||
|
||||
pub(crate) fn add_constant(&mut self, c: Constant) -> u16 {
|
||||
if let Some(key) = ConstantKey::from_constant(&c) {
|
||||
if let Some(&idx) = self.constant_map.get(&key) {
|
||||
return idx;
|
||||
}
|
||||
|
||||
if self.constants.len() >= u16::MAX as usize {
|
||||
self.const_overflow = true;
|
||||
return u16::MAX;
|
||||
}
|
||||
let idx = self.constants.len() as u16;
|
||||
self.constants.push(c);
|
||||
self.constant_map.insert(key, idx);
|
||||
return idx;
|
||||
}
|
||||
|
||||
let idx = self.constants.len();
|
||||
if idx >= u16::MAX as usize {
|
||||
self.const_overflow = true;
|
||||
return u16::MAX;
|
||||
}
|
||||
self.constants.push(c);
|
||||
idx as u16
|
||||
}
|
||||
|
||||
pub(crate) fn push_scope(&mut self) {
|
||||
self.scopes.symbols.push_scope();
|
||||
}
|
||||
|
||||
pub(crate) fn pop_scope(&mut self) {
|
||||
self.scopes.symbols.pop_scope();
|
||||
}
|
||||
|
||||
pub(crate) fn declare(
|
||||
&mut self, name: &str, reg: u32, kind: VariableDeclarationKind, is_const: bool,
|
||||
) -> Result<(), String> {
|
||||
self.scopes.symbols.declare(name, reg, kind, is_const)
|
||||
}
|
||||
|
||||
pub(crate) fn declare_initialized(
|
||||
&mut self, name: &str, reg: u32, kind: VariableDeclarationKind, is_const: bool,
|
||||
) -> Result<(), String> {
|
||||
self.scopes.symbols.declare_initialized(name, reg, kind, is_const)
|
||||
}
|
||||
|
||||
pub(crate) fn declare_predeclared(
|
||||
&mut self, name: &str, reg: u32, kind: VariableDeclarationKind, is_const: bool,
|
||||
) -> Result<(), String> {
|
||||
self.scopes.symbols.declare_predeclared(name, reg, kind, is_const)
|
||||
}
|
||||
|
||||
pub(crate) fn push_scope_with_kind(&mut self, kind: ScopeKind) {
|
||||
self.scopes.symbols.push_scope_with_kind(kind);
|
||||
}
|
||||
|
||||
pub(crate) fn lookup(&self, name: &str) -> Result<u32, String> {
|
||||
self.scopes.symbols.lookup(name)
|
||||
}
|
||||
|
||||
pub(crate) fn lookup_or_builtin(&mut self, name: &str) -> Result<u32, String> {
|
||||
match self.scopes.symbols.lookup(name) {
|
||||
Ok(reg) => Ok(reg),
|
||||
// 未声明标识符按隐式全局登记：读取语义（读未声明应抛 ReferenceError）由
|
||||
// 发射端按 implicit_global_reads 择 LOAD_GLOBAL 实现；`typeof X` 守卫等
|
||||
// 合法 JS 在运行期判定未定义（typeof 特判走 LOAD_GLOBAL_TYPEOF）。
|
||||
Err(err) if err.contains("is not defined") => {
|
||||
let reg = self.alloc_reg();
|
||||
self.scopes.symbols.pre_register_global(name, reg);
|
||||
self.scopes.builtin_reg_map.push((name.to_string(), reg));
|
||||
// 内置名（预扫描阶段在空符号表上登记）不是用户未声明读，不标记——
|
||||
// 否则内置标识符读取全部改走 LOAD_GLOBAL（热路径退化 + 槽位被修剪）。
|
||||
if !Self::is_known_builtin(name) {
|
||||
self.implicit_global_reads.insert(reg);
|
||||
}
|
||||
Ok(reg)
|
||||
}
|
||||
Err(err) => Err(err),
|
||||
}
|
||||
}
|
||||
|
||||
pub(crate) fn lookup_or_global(&mut self, name: &str) -> u32 {
|
||||
if let Some(reg) = self.scopes.symbols.lookup_any(name) {
|
||||
return reg;
|
||||
}
|
||||
let reg = self.alloc_reg();
|
||||
// 未声明标识符写：登记全局作用域绑定，记录寄存器供写调用点补全局对象属性
|
||||
// 写（sloppy）或抛 ReferenceError（strict）。
|
||||
self.implicit_global_writes.insert(reg);
|
||||
self.scopes.symbols.lookup_or_global(name, reg)
|
||||
}
|
||||
|
||||
/// 寄存器是否承载未声明标识符的全局槽（写调用点据此补全局对象属性写或抛
|
||||
/// ReferenceError）。读写两个登记集合取并：未声明名谁先引用谁登记，读侧登记
|
||||
/// （LOAD_GLOBAL 槽）与写侧登记同属一个全局槽，写都必须穿透到全局对象。
|
||||
pub(crate) fn is_implicit_global_reg(&self, reg: u32) -> bool {
|
||||
self.implicit_global_writes.contains(®) || self.implicit_global_reads.contains(®)
|
||||
}
|
||||
|
||||
pub(crate) fn lookup_const_flag(&self, name: &str) -> bool {
|
||||
// upvalue 捕获的 const：子 ctx 符号表不含父函数作用域绑定，查快照标志。
|
||||
self.scopes.symbols.lookup_is_const(name) || self.upvalue_const_flags.contains(name)
|
||||
}
|
||||
|
||||
pub(crate) fn init_var(&mut self, name: &str) {
|
||||
self.scopes.symbols.init_var(name);
|
||||
}
|
||||
|
||||
pub(crate) fn next_label_id(&mut self) -> u32 {
|
||||
let id = self.labels.label_counter;
|
||||
self.labels.label_counter += 1;
|
||||
id
|
||||
}
|
||||
|
||||
pub(crate) fn push_loop(&mut self, break_label: LabelId, continue_label: LabelId, kind: LoopKind) {
|
||||
let fd = self.labels.finally_depth;
|
||||
// 深度计数先递增再快照：条目记录"打开后（含自身）"的深度，与
|
||||
// take_pending_loop_labels 的标签作用域快照一致，逃出计数才能对齐。
|
||||
if kind.is_for_of() {
|
||||
self.labels.for_of_depth += 1;
|
||||
}
|
||||
if kind.is_for_in() {
|
||||
self.labels.for_in_depth += 1;
|
||||
}
|
||||
let fod = self.labels.for_of_depth;
|
||||
let fid = self.labels.for_in_depth;
|
||||
self.labels.loop_stack.push(LoopEntry {
|
||||
break_label,
|
||||
continue_label,
|
||||
finally_depth_at_open: fd,
|
||||
for_of_depth_at_open: fod,
|
||||
for_in_depth_at_open: fid,
|
||||
kind,
|
||||
});
|
||||
}
|
||||
|
||||
pub(crate) fn pop_loop(&mut self) {
|
||||
if let Some(entry) = self.labels.loop_stack.pop() {
|
||||
if entry.kind.is_for_of() {
|
||||
self.labels.for_of_depth -= 1;
|
||||
}
|
||||
if entry.kind.is_for_in() {
|
||||
self.labels.for_in_depth -= 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub(crate) fn current_loop(&self) -> Option<&LoopEntry> {
|
||||
self.labels.loop_stack.last()
|
||||
}
|
||||
|
||||
pub(crate) fn push_switch(&mut self, break_label: LabelId) {
|
||||
let fd = self.labels.finally_depth;
|
||||
let fod = self.labels.for_of_depth;
|
||||
let fid = self.labels.for_in_depth;
|
||||
self.labels.switch_stack.push((break_label, fd, fod, fid));
|
||||
}
|
||||
|
||||
pub(crate) fn pop_switch(&mut self) {
|
||||
self.labels.switch_stack.pop();
|
||||
}
|
||||
|
||||
pub(crate) fn current_switch(&self) -> Option<&(LabelId, usize, usize, usize)> {
|
||||
self.labels.switch_stack.last()
|
||||
}
|
||||
|
||||
/// 进入/离开一个 try/finally 域：break/continue 跨越 finally 计数用。
|
||||
pub(crate) fn push_finally_domain(&mut self) {
|
||||
self.labels.finally_depth += 1;
|
||||
}
|
||||
|
||||
pub(crate) fn pop_finally_domain(&mut self) {
|
||||
self.labels.finally_depth -= 1;
|
||||
}
|
||||
|
||||
/// 记录一个纯 catch handler 打开（对应 emit try_begin 后的运行时 TRY_BEGIN）。
|
||||
pub(crate) fn push_open_catch_handler(&mut self) {
|
||||
self.open_try_handlers.push(true);
|
||||
}
|
||||
|
||||
/// 记录一个 finally handler 打开（对应 emit try_finally_begin 后的运行时
|
||||
/// TRY_FINALLY_BEGIN）。
|
||||
pub(crate) fn push_open_finally_handler(&mut self) {
|
||||
self.open_try_handlers.push(false);
|
||||
}
|
||||
|
||||
/// 弹出最近打开的 handler（对应 emit 的 TRY_END / TRY_FINALLY_END）。
|
||||
pub(crate) fn pop_open_try_handler(&mut self) {
|
||||
self.open_try_handlers.pop();
|
||||
}
|
||||
|
||||
/// 栈顶连续打开的纯 catch handler 数（遇 finally handler 即停）。
|
||||
/// return 逃出本函数时，这些 handler 可由 TRY_END 直接从栈顶弹出；
|
||||
/// finally 之下的 catch 无法经 TRY_END 弹出，交给运行时统一清理。
|
||||
pub(crate) fn top_open_catch_handlers(&self) -> usize {
|
||||
self.open_try_handlers.iter().rev().take_while(|&&is_catch| is_catch).count()
|
||||
}
|
||||
|
||||
pub(crate) fn push_label_scope(
|
||||
&mut self, name: &str, break_label: LabelId, continue_label: Option<LabelId>,
|
||||
) -> Result<(), String> {
|
||||
if self.labels.label_scopes.iter().any(|s| s.name == name) {
|
||||
return Err(format!("SyntaxError: Label '{name}' has already been declared"));
|
||||
}
|
||||
let fd = self.labels.finally_depth;
|
||||
let fod = self.labels.for_of_depth;
|
||||
let fid = self.labels.for_in_depth;
|
||||
self.labels.label_scopes.push(LabelScope {
|
||||
name: name.to_string(),
|
||||
break_label,
|
||||
continue_label,
|
||||
finally_depth_at_open: fd,
|
||||
for_of_depth_at_open: fod,
|
||||
for_in_depth_at_open: fid,
|
||||
});
|
||||
Ok(())
|
||||
}
|
||||
|
||||
pub(crate) fn pop_label_scope(&mut self) {
|
||||
self.labels.label_scopes.pop();
|
||||
}
|
||||
|
||||
pub(crate) fn find_label(&self, name: &str) -> Option<&LabelScope> {
|
||||
self.labels.label_scopes.iter().rev().find(|s| s.name == name)
|
||||
}
|
||||
|
||||
/// 登记一个待绑定标签名：该标签将作为下一个 emit 的循环（标签语句体）的
|
||||
/// continue 目标。活动集合与待绑定集合中出现重名报错。
|
||||
pub(crate) fn queue_loop_label(&mut self, name: &str) -> Result<(), String> {
|
||||
if self.labels.label_scopes.iter().any(|s| s.name == name)
|
||||
|| self.labels.pending_loop_labels.iter().any(|n| n == name)
|
||||
{
|
||||
return Err(format!("SyntaxError: Label '{name}' has already been declared"));
|
||||
}
|
||||
self.labels.pending_loop_labels.push(name.to_string());
|
||||
Ok(())
|
||||
}
|
||||
|
||||
/// 把待绑定标签名落地为活动标签作用域，绑定到本次循环的 break/continue 目标。
|
||||
/// 返回压入的作用域个数（供事后对称弹出）。
|
||||
pub(crate) fn take_pending_loop_labels(&mut self, break_label: LabelId, continue_label: LabelId) -> usize {
|
||||
let names = std::mem::take(&mut self.labels.pending_loop_labels);
|
||||
let count = names.len();
|
||||
let fd = self.labels.finally_depth;
|
||||
let fod = self.labels.for_of_depth;
|
||||
let fid = self.labels.for_in_depth;
|
||||
for name in names {
|
||||
self.labels.label_scopes.push(LabelScope {
|
||||
name,
|
||||
break_label,
|
||||
continue_label: Some(continue_label),
|
||||
finally_depth_at_open: fd,
|
||||
for_of_depth_at_open: fod,
|
||||
for_in_depth_at_open: fid,
|
||||
});
|
||||
}
|
||||
count
|
||||
}
|
||||
|
||||
pub(crate) fn pop_label_scopes(&mut self, n: usize) {
|
||||
for _ in 0..n {
|
||||
self.labels.label_scopes.pop();
|
||||
}
|
||||
}
|
||||
|
||||
pub(crate) fn is_builtin(&self, name: &str) -> bool {
|
||||
self.scopes.builtin_reg_map.iter().any(|(n, _)| n == name)
|
||||
}
|
||||
|
||||
/// 内置名是否被局部声明遮蔽（`var parseInt = ...` 等）。
|
||||
/// builtin_reg_map 记录的是全局内置槽；若该名在静态作用域另有绑定，则调用应解析局部。
|
||||
pub(crate) fn is_local_shadowing_builtin(&self, name: &str) -> bool {
|
||||
if let Some(reg) = self.scopes.symbols.lookup_any(name) {
|
||||
let is_builtin_slot = self.scopes.builtin_reg_map.iter().any(|(n, r)| n == name && *r == reg);
|
||||
return !is_builtin_slot;
|
||||
}
|
||||
false
|
||||
}
|
||||
|
||||
/// 名字是否解析到全局内置槽：builtin_reg_map 登记（预注册镜像槽），或绑定
|
||||
/// 落全局作用域（scope 0，顶层 var 预声明/隐式全局，含继承的全局槽）。局部
|
||||
/// var/let/参数遮蔽同名时解析到局部寄存器/局部作用域，两条件均不命中。
|
||||
fn resolves_to_global_builtin_slot(&self, name: &str, reg: u32) -> bool {
|
||||
if self.scopes.builtin_reg_map.iter().any(|(n, r)| n == name && *r == reg) {
|
||||
return true;
|
||||
}
|
||||
matches!(self.scopes.symbols.lookup_any_binding(name), Some((_, 0)))
|
||||
}
|
||||
|
||||
/// 写目标是否为只读全局内置（undefined/NaN/Infinity 的全局绑定——全局对象上
|
||||
/// 数据属性 {writable:false, configurable:false}，put 永不成功）。名字在只读
|
||||
/// 名单内且解析到全局内置槽；声明臂与赋值臂共用本谓词。
|
||||
pub(crate) fn targets_readonly_builtin(&self, name: &str, reg: u32) -> bool {
|
||||
NON_WRITABLE_GLOBAL_BUILTINS.contains(&name) && self.resolves_to_global_builtin_slot(name, reg)
|
||||
}
|
||||
|
||||
/// 写目标是否为可写全局内置（全局对象上数据属性 {writable:true,
|
||||
/// configurable:true}）。标识符写须双写镜像槽 + 全局对象属性，否则裸读
|
||||
/// （镜像）与 globalThis 反射（属性）失步。
|
||||
pub(crate) fn targets_writable_builtin(&self, name: &str, reg: u32) -> bool {
|
||||
Self::is_writable_builtin_global(name) && self.resolves_to_global_builtin_slot(name, reg)
|
||||
}
|
||||
|
||||
/// 规范可写全局名：BUILTIN_GLOBALS 减只读三常量集——11 个 w:true 函数、
|
||||
/// 48 个构造器/命名空间、globalThis 与宿主名，描述符皆
|
||||
/// {writable:true, enumerable:false, configurable:true}。
|
||||
pub(crate) fn is_writable_builtin_global(name: &str) -> bool {
|
||||
BUILTIN_GLOBALS.contains(&name) && !NON_WRITABLE_GLOBAL_BUILTINS.contains(&name)
|
||||
}
|
||||
|
||||
/// 可删除全局内置名：可写全局名再除宿主名 $262（harness 全局
|
||||
/// {configurable:false}，删除会破坏宿主面）——自只读/可写单一真源派生，
|
||||
/// 不另立名单。余名描述符皆 {writable:true, configurable:true}，delete
|
||||
/// 真删且返 true。
|
||||
pub(crate) fn is_deletable_global_builtin(name: &str) -> bool {
|
||||
Self::is_writable_builtin_global(name) && name != "$262"
|
||||
}
|
||||
|
||||
/// delete 标识符是否解析到可删除的全局内置镜像槽：名可删（上谓词）且预注册
|
||||
/// 镜像槽在册时返回槽寄存器。局部 var/let/参数遮蔽同名时该名不注册镜像槽
|
||||
/// （预扫描解析到局部绑定），不命中；槽值在 run/帧入口由全局属性预载。
|
||||
pub(crate) fn global_builtin_delete_slot(&self, name: &str) -> Option<u32> {
|
||||
if !Self::is_deletable_global_builtin(name) {
|
||||
return None;
|
||||
}
|
||||
self.scopes.builtin_reg_map.iter().find(|(n, _)| n == name).map(|(_, r)| *r)
|
||||
}
|
||||
|
||||
pub(crate) fn is_known_builtin(name: &str) -> bool {
|
||||
BUILTIN_GLOBALS.contains(&name)
|
||||
}
|
||||
|
||||
/// 规范不可声明的全局名：只读三常量（全局对象上数据属性
|
||||
/// {writable:false, configurable:false}）——顶层块级函数名仅这一面不建
|
||||
/// 外层绑定、不求值写回（sloppy put 永不成功，跳过与执行等价）；其余
|
||||
/// 已知 builtin（parseInt 等）属性可配置，可声明（求值期覆写全局属性）。
|
||||
pub(crate) fn is_non_writable_global_builtin(name: &str) -> bool {
|
||||
NON_WRITABLE_GLOBAL_BUILTINS.contains(&name)
|
||||
}
|
||||
|
||||
/// 进入 with 语句体：记录对象寄存器与当前作用域深度，供动态标识符解析。
|
||||
pub(crate) fn push_with(&mut self, obj_reg: u32) {
|
||||
let depth = self.scopes.symbols.scopes.len();
|
||||
self.with_stack.push((obj_reg, depth));
|
||||
}
|
||||
|
||||
/// 离开 with 语句体。
|
||||
pub(crate) fn pop_with(&mut self) {
|
||||
self.with_stack.pop();
|
||||
}
|
||||
|
||||
/// 最内层 with 对象寄存器；无 with 时为 None。
|
||||
pub(crate) fn innermost_with_obj(&self) -> Option<u32> {
|
||||
self.with_stack.last().map(|&(reg, _)| reg)
|
||||
}
|
||||
|
||||
/// 指定名字是否在 with 语句体**内**（with 打开之后的块作用域）声明。
|
||||
/// with 内声明优先于对象属性；with 之前的外层声明被对象遮蔽。
|
||||
pub(crate) fn is_with_internal_binding(&self, name: &str) -> bool {
|
||||
let Some(&(_, depth)) = self.with_stack.last() else {
|
||||
return false;
|
||||
};
|
||||
matches!(self.scopes.symbols.lookup_any_binding(name), Some((_, idx)) if idx >= depth)
|
||||
}
|
||||
|
||||
fn builtin_reg_floor(&self) -> u32 {
|
||||
self.scopes
|
||||
.builtin_reg_map
|
||||
.iter()
|
||||
.map(|(_, reg)| reg.saturating_add(1))
|
||||
.max()
|
||||
.unwrap_or(0)
|
||||
}
|
||||
|
||||
/// 组装 IRFunction（两出口共用），take 走编译产物状态。
|
||||
/// `parent_ctx` 用于补全 upvalue_captures 的 enclosing_reg（父符号表在父 emit 完成后完整）。
|
||||
pub(crate) fn assemble_ir(
|
||||
&mut self, param_layout: oxide_ir::ParamLayout, parent_ctx: Option<&CompileCtx>,
|
||||
) -> IRFunction {
|
||||
let upvalue_captures = self
|
||||
.current_upvalue_captures
|
||||
.iter()
|
||||
.map(|u| {
|
||||
let enclosing_reg = parent_ctx
|
||||
.and_then(|p| p.scopes.symbols.lookup_any(u.name.as_str()))
|
||||
.unwrap_or(0);
|
||||
UpvalueCapture {
|
||||
name: u.name.clone(),
|
||||
enclosing_reg,
|
||||
cell_idx: u.cell_idx,
|
||||
parent_uv_idx: u.parent_uv_idx,
|
||||
}
|
||||
})
|
||||
.collect();
|
||||
IRFunction {
|
||||
insts: std::mem::take(&mut self.insts),
|
||||
label_pos: std::mem::take(&mut self.labels.label_pos),
|
||||
label_count: self.labels.label_counter,
|
||||
constants: std::mem::take(&mut self.constants),
|
||||
param_layout,
|
||||
builtin_reg_map: std::mem::take(&mut self.scopes.builtin_reg_map),
|
||||
upvalue_captures,
|
||||
cells_needed: self.captured_bindings.len() as u8,
|
||||
n_registers: self.max_regs,
|
||||
is_arrow: false,
|
||||
is_class_constructor: false,
|
||||
is_derived_constructor: false,
|
||||
needs_home_object: false,
|
||||
is_generator: self.is_generator,
|
||||
is_async: self.is_async,
|
||||
is_strict: self.is_strict,
|
||||
captured_this_const_idx: 0,
|
||||
function_name: None,
|
||||
function_length: self.function_length,
|
||||
is_top_level: parent_ctx.is_none(),
|
||||
const_overflow: self.const_overflow,
|
||||
nested: std::mem::take(&mut self.nested),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl ConstantKey {
|
||||
fn from_constant(value: &Constant) -> Option<Self> {
|
||||
match value {
|
||||
Constant::Number(v) => Some(Self::Number(v.to_bits())),
|
||||
Constant::Int(v) => Some(Self::Int(*v)),
|
||||
Constant::BigInt(v) => Some(Self::BigInt(v.clone())),
|
||||
Constant::String(v) => Some(Self::String(v.clone())),
|
||||
Constant::Boolean(v) => Some(Self::Boolean(*v)),
|
||||
Constant::Null => Some(Self::Null),
|
||||
Constant::Undefined => Some(Self::Undefined),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl Emitter {
|
||||
/// 构造空 `Emitter`（静态编译口径：源文本为良形 UTF-8，无注入 marker）。
|
||||
pub fn new() -> Self {
|
||||
|
||||
@@ -6,7 +6,6 @@
|
||||
//! 平铺在 `CompileCtx` 上。
|
||||
|
||||
use crate::symbol_table::SymbolTable;
|
||||
use crate::LabelScope;
|
||||
use oxide_ir::operand::LabelId;
|
||||
use oxide_parser::MethodDefinitionKind;
|
||||
|
||||
@@ -48,6 +47,21 @@ pub(crate) struct LoopEntry {
|
||||
pub(crate) kind: LoopKind,
|
||||
}
|
||||
|
||||
/// 标签语句作用域：编译期内登记 `break label` / `continue label` 的跳转目标。
|
||||
/// `continue_label` 仅在标签直接包裹迭代语句时存在。
|
||||
#[derive(Debug, Clone)]
|
||||
pub struct LabelScope {
|
||||
pub(crate) name: String,
|
||||
pub(crate) break_label: LabelId,
|
||||
pub(crate) continue_label: Option<LabelId>,
|
||||
/// 标签打开时嵌套的 finally 域数：break/continue 跨越 finally 的计数依据。
|
||||
pub(crate) finally_depth_at_open: usize,
|
||||
/// 标签打开时已打开的 for-of 循环数：break/continue 逃出计数依据。
|
||||
pub(crate) for_of_depth_at_open: usize,
|
||||
/// 标签打开时已打开的 for-in 循环数。
|
||||
pub(crate) for_in_depth_at_open: usize,
|
||||
}
|
||||
|
||||
/// 跳转目标 / 标签语句解析状态。
|
||||
pub(crate) struct LabelCtx {
|
||||
/// label id → 指令下标。id 连续递增，Vec 索引即 id；写入前须扩容。
|
||||
|
||||
@@ -7,6 +7,7 @@
|
||||
|
||||
pub mod class;
|
||||
pub mod closure;
|
||||
mod compile_ctx;
|
||||
pub mod emit;
|
||||
pub mod emit_ctx;
|
||||
mod emit_log;
|
||||
@@ -17,7 +18,9 @@ pub mod shared;
|
||||
pub mod stmt;
|
||||
pub mod symbol_table;
|
||||
|
||||
pub use compile_ctx::CompileCtx;
|
||||
pub use emit::{is_anonymous_function_definition, is_int_literal, is_side_effect_free};
|
||||
pub use emit::{CompileCtx, Emitter, FunctionBodyContext, LabelScope, ParamSpec};
|
||||
pub use emit::{Emitter, FunctionBodyContext, ParamSpec};
|
||||
pub use emit_ctx::LabelScope;
|
||||
pub use oxide_bytecode::module::Constant;
|
||||
pub use oxide_parser::{AssignmentOperator, BinaryOperator, UnaryOperator};
|
||||
|
||||
Reference in New Issue
Block a user