mirror of
https://github.com/pjh456/OxideJS.git
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91 lines
2.6 KiB
Rust
91 lines
2.6 KiB
Rust
//! IR 中间表示：AST→IR→字节码 流水线的程序表示。
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//!
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//! 单一程序表示（D-01），分域组合（D-02）：
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//! - code: 指令流 + label 位置
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//! - data: 常量池
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//! - bindings: 参数布局
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//! - builtins: 内置全局 → 寄存器
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//! - closures: 闭包捕获 + cell
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//! - meta: 函数元信息 + 溢出证据
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//! - nested: 子函数（递归 IR，替代 sub_modules）
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//!
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//! 分析视图（CFG/LiveInfo/AllocMap）是 pass 输出，不住进 IR。
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pub mod inst;
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pub mod lower;
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pub mod operand;
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use oxide_bytecode::module::{Constant, UpvalueCapture};
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use crate::inst::Inst;
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/// 参数段布局：base 起 count 个寄存器连续（VM 调用契约），RegAlloc 输入。
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#[derive(Debug, Clone, Copy, PartialEq, Eq)]
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pub struct ParamLayout {
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pub base: u32,
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pub count: u32,
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}
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/// 单函数 IR。分域组合，嵌套封顶两层。
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#[derive(Debug, Clone)]
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pub struct IRFunction {
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// code 域
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pub insts: Vec<Inst>,
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/// label id → 指令下标。id 连续递增，Vec 索引即 id；写入前须扩容。
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pub label_pos: Vec<Option<usize>>,
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pub label_count: u32,
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// data 域
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pub constants: Vec<Constant>,
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// bindings 域
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pub param_layout: ParamLayout,
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// builtins 域
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pub builtin_reg_map: Vec<(String, u8)>,
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// closures 域
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pub upvalue_captures: Vec<UpvalueCapture>,
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pub cells_needed: u8,
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// meta 域
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pub n_registers: u8,
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pub is_arrow: bool,
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pub is_class_constructor: bool,
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pub is_derived_constructor: bool,
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pub needs_home_object: bool,
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pub captured_this_const_idx: u16,
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pub function_name: Option<String>,
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/// emit 侧溢出证据，lowering 读标志报错（D-20）。
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pub reg_overflow: bool,
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pub const_overflow: bool,
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// nested 域
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pub nested: Vec<IRFunction>,
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}
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impl IRFunction {
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pub fn new() -> Self {
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Self {
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insts: Vec::new(),
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label_pos: Vec::new(),
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label_count: 0,
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constants: Vec::new(),
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param_layout: ParamLayout { base: 0, count: 0 },
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builtin_reg_map: Vec::new(),
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upvalue_captures: Vec::new(),
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cells_needed: 0,
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n_registers: 0,
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is_arrow: false,
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is_class_constructor: false,
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is_derived_constructor: false,
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needs_home_object: false,
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captured_this_const_idx: 0,
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function_name: None,
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reg_overflow: false,
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const_overflow: false,
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nested: Vec::new(),
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}
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}
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}
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impl Default for IRFunction {
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fn default() -> Self {
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Self::new()
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}
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}
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