refactor: 拆分 oxide_ir 为独立 crate

crates/oxide_compiler/src/class/emit.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{CompileCtx, Compiler, FunctionBodyContext};
-use crate::ir::inst::Inst;
-use crate::ir::operand::Operand;
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::Operand;
 use oxide_bytecode::opcode::OpCode;
 use oxide_parser::{Class, ClassElement, MethodDefinitionKind, PropertyKey};
 

crates/oxide_compiler/src/class/field.rs

@@ -1,5 +1,5 @@
 use crate::compiler::{CompileCtx, Compiler};
-use crate::ir::operand::Operand;
+use oxide_ir::operand::Operand;
 use oxide_parser::{ClassElement, PropertyKey};
 
 impl Compiler {

crates/oxide_compiler/src/class/method.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{CompileCtx, Compiler, FunctionBodyContext};
-use crate::ir::inst::Inst;
-use crate::ir::operand::Operand;
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::Operand;
 use oxide_bytecode::module::Constant;
 use oxide_bytecode::opcode::OpCode;
 use oxide_parser::{ClassElement, MethodDefinitionKind, PropertyKey};

crates/oxide_compiler/src/class/prototype.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{CompileCtx, Compiler};
-use crate::ir::inst::Inst;
-use crate::ir::operand::Operand;
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::Operand;
 use oxide_bytecode::module::Constant;
 use oxide_bytecode::opcode::OpCode;
 

crates/oxide_compiler/src/compiler.rs

@@ -1,10 +1,10 @@
 use std::collections::{BTreeMap, HashMap, HashSet};
 
 use crate::emit_ctx::{LabelCtx, ScopeCtx};
-use crate::ir::inst::Inst;
-use crate::ir::lower::lower;
-use crate::ir::operand::{LabelId, Operand};
-use crate::ir::IRFunction;
+use oxide_ir::inst::Inst;
+use oxide_ir::lower::lower;
+use oxide_ir::operand::{LabelId, Operand};
+use oxide_ir::IRFunction;
 use crate::symbol_table::{Binding, SymbolTable};
 use oxide_bytecode::module::CompiledModule;
 use oxide_bytecode::module::UpvalueCapture;
@@ -464,7 +464,7 @@ impl CompileCtx {
 
     /// 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）。
-    fn assemble_ir(&mut self, param_layout: crate::ir::ParamLayout, parent_ctx: Option<&CompileCtx>) -> IRFunction {
+    fn assemble_ir(&mut self, param_layout: oxide_ir::ParamLayout, parent_ctx: Option<&CompileCtx>) -> IRFunction {
         let upvalue_captures = self
             .current_upvalue_captures
             .iter()
@@ -716,7 +716,7 @@ impl Compiler {
         }
 
         let ir = ctx.assemble_ir(
-            crate::ir::ParamLayout {
+            oxide_ir::ParamLayout {
                 base: param_base as u32,
                 count: param_specs.len() as u32,
             },
@@ -889,7 +889,7 @@ impl Compiler {
         crate::compiler_debug!("compile: done, {} instructions, {} constants", ctx.insts.len(), ctx.constants.len());
 
         let ir = ctx.assemble_ir(
-            crate::ir::ParamLayout {
+            oxide_ir::ParamLayout {
                 base: ctx.scopes.builtin_reg_map.len() as u32,
                 count: 0,
             },

crates/oxide_compiler/src/emit_ctx.rs

@@ -7,7 +7,7 @@
 //! `CompileCtx`.
 
 use crate::compiler::LabelScope;
-use crate::ir::operand::LabelId;
+use oxide_ir::operand::LabelId;
 use crate::symbol_table::SymbolTable;
 
 /// Jump-target / labeled-statement resolution state.

crates/oxide_compiler/src/expr/assignment.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{CompileCtx, Compiler};
-use crate::ir::inst::Inst;
-use crate::ir::operand::Operand;
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::Operand;
 use oxide_bytecode::module::Constant;
 use oxide_bytecode::opcode::OpCode;
 use oxide_parser::AssignmentOperator;

crates/oxide_compiler/src/expr/call.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{CompileCtx, Compiler};
-use crate::ir::inst::Inst;
-use crate::ir::operand::Operand;
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::Operand;
 use oxide_bytecode::module::Constant;
 use oxide_bytecode::opcode::OpCode;
 use oxide_parser::Expression;

crates/oxide_compiler/src/expr/function/mod.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{CompileCtx, Compiler, ParamSpec};
-use crate::ir::inst::Inst;
-use crate::ir::operand::Operand;
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::Operand;
 use oxide_parser::{Class, Expression, Statement};
 
 impl Compiler {

crates/oxide_compiler/src/expr/identifier.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{CompileCtx, Compiler};
-use crate::ir::inst::Inst;
-use crate::ir::operand::Operand;
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::Operand;
 use oxide_bytecode::opcode::OpCode;
 
 impl Compiler {

crates/oxide_compiler/src/expr/literal.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{is_int_literal, CompileCtx, Compiler};
-use crate::ir::inst::Inst;
-use crate::ir::operand::Operand;
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::Operand;
 use oxide_bytecode::module::Constant;
 use oxide_bytecode::opcode::OpCode;
 use oxide_parser::Expression;

crates/oxide_compiler/src/expr/member/mod.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{CompileCtx, Compiler};
-use crate::ir::inst::Inst;
-use crate::ir::operand::Operand;
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::Operand;
 use oxide_bytecode::module::Constant;
 use oxide_bytecode::opcode::OpCode;
 use oxide_parser::Expression;

crates/oxide_compiler/src/expr/object/array.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{CompileCtx, Compiler};
-use crate::ir::inst::Inst;
-use crate::ir::operand::Operand;
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::Operand;
 use oxide_bytecode::module::Constant;
 use oxide_bytecode::opcode::OpCode;
 impl Compiler {

crates/oxide_compiler/src/expr/object/object_literal.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{CompileCtx, Compiler};
-use crate::ir::inst::Inst;
-use crate::ir::operand::Operand;
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::Operand;
 use oxide_bytecode::module::Constant;
 use oxide_bytecode::opcode::OpCode;
 use oxide_parser::{Expression, ObjectPropertyKind, PropertyKey, PropertyKind};

crates/oxide_compiler/src/expr/operator/mod.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{is_side_effect_free, BinaryOperator, CompileCtx, Compiler};
-use crate::ir::inst::Inst;
-use crate::ir::operand::Operand;
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::Operand;
 use oxide_bytecode::module::Constant;
 use oxide_bytecode::opcode::OpCode;
 use oxide_parser::{ChainElement, Expression, LogicalOperator, SimpleAssignmentTarget, UnaryOperator, UpdateOperator};

crates/oxide_compiler/src/expr/template/tagged.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{CompileCtx, Compiler};
-use crate::ir::inst::Inst;
-use crate::ir::operand::Operand;
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::Operand;
 use oxide_bytecode::module::Constant;
 use oxide_bytecode::opcode::OpCode;
 impl Compiler {

crates/oxide_compiler/src/expr/template/template_literal.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{CompileCtx, Compiler};
-use crate::ir::inst::Inst;
-use crate::ir::operand::Operand;
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::Operand;
 use oxide_bytecode::module::Constant;
 
 impl Compiler {

crates/oxide_compiler/src/expr/this.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{CompileCtx, Compiler};
-use crate::ir::inst::Inst;
-use crate::ir::operand::Operand;
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::Operand;
 use oxide_bytecode::opcode::OpCode;
 
 impl Compiler {

crates/oxide_compiler/src/ir/inst.rs

@@ -1,295 +0,0 @@
-//! IR 指令结构 + 构造 API。
-//!
-//! `ext` 内部是裸 u32（lowering 直拼字节码扩展字）。扩展字的**数量与语义值编码**
-//! 全部由 `inst_*` 构造 API 保证——emit 代码不直接触碰 `ext` 字段。
-
-use oxide_bytecode::opcode::OpCode;
-use smallvec::SmallVec;
-
-use super::operand::{LabelId, Operand};
-
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub struct Inst {
-    pub op: OpCode,
-    pub rd: Operand,
-    pub a: Operand,
-    pub b: Operand,
-    pub ext: SmallVec<[u32; 4]>,
-}
-
-impl Inst {
-    /// 基础构造：ext 为空。
-    pub fn new(op: OpCode, rd: Operand, a: Operand, b: Operand) -> Self {
-        Self {
-            op,
-            rd,
-            a,
-            b,
-            ext: SmallVec::new(),
-        }
-    }
-
-    fn with_ext(op: OpCode, rd: Operand, a: Operand, b: Operand, ext: &[u32]) -> Self {
-        Self {
-            op,
-            rd,
-            a,
-            b,
-            ext: SmallVec::from_slice(ext),
-        }
-    }
-
-    // ── IC 系：ext = [0, 0, 0]（shape/slot/proto 占位字，VM 运行时 patch）──
-
-    pub fn ic_get(dst: Operand, key: Operand) -> Self {
-        Self::with_ext(OpCode::IC_GET_PROP, Operand::None, dst, key, &[0, 0, 0])
-    }
-
-    pub fn ic_set(obj: Operand, value: Operand, key: Operand) -> Self {
-        Self::with_ext(OpCode::IC_SET_PROP, obj, value, key, &[0, 0, 0])
-    }
-
-    pub fn member_inc(obj: Operand, val: Operand, key: Operand) -> Self {
-        Self::with_ext(OpCode::MEMBER_INC, obj, val, key, &[0, 0, 0])
-    }
-
-    pub fn member_dec(obj: Operand, val: Operand, key: Operand) -> Self {
-        Self::with_ext(OpCode::MEMBER_DEC, obj, val, key, &[0, 0, 0])
-    }
-
-    pub fn compound_member_add(obj: Operand, val: Operand, key: Operand) -> Self {
-        Self::with_ext(OpCode::COMPOUND_MEMBER_ADD, obj, val, key, &[0, 0, 0])
-    }
-
-    pub fn compound_member_sub(obj: Operand, val: Operand, key: Operand) -> Self {
-        Self::with_ext(OpCode::COMPOUND_MEMBER_SUB, obj, val, key, &[0, 0, 0])
-    }
-
-    pub fn compound_member_mul(obj: Operand, val: Operand, key: Operand) -> Self {
-        Self::with_ext(OpCode::COMPOUND_MEMBER_MUL, obj, val, key, &[0, 0, 0])
-    }
-
-    pub fn compound_member_div(obj: Operand, val: Operand, key: Operand) -> Self {
-        Self::with_ext(OpCode::COMPOUND_MEMBER_DIV, obj, val, key, &[0, 0, 0])
-    }
-
-    pub fn compound_member_mod(obj: Operand, val: Operand, key: Operand) -> Self {
-        Self::with_ext(OpCode::COMPOUND_MEMBER_MOD, obj, val, key, &[0, 0, 0])
-    }
-
-    pub fn compound_member_exp(obj: Operand, val: Operand, key: Operand) -> Self {
-        Self::with_ext(OpCode::COMPOUND_MEMBER_EXP, obj, val, key, &[0, 0, 0])
-    }
-
-    // ── Call 系：ext = [nargs] ──
-
-    pub fn call(callee: Operand, this: Operand, first_arg: Operand, nargs: u8) -> Self {
-        Self::with_ext(OpCode::CALL, callee, this, first_arg, &[nargs as u32])
-    }
-
-    pub fn call_native(callee: Operand, this: Operand, first_arg: Operand, nargs: u8) -> Self {
-        Self::with_ext(OpCode::CALL_NATIVE, callee, this, first_arg, &[nargs as u32])
-    }
-
-    pub fn new_expression(result: Operand, constructor: Operand, first_arg: Operand, nargs: u8) -> Self {
-        Self::with_ext(OpCode::NEW_EXPRESSION, result, constructor, first_arg, &[nargs as u32])
-    }
-
-    pub fn super_call(result: Operand, first_arg: Operand, nargs: u8) -> Self {
-        Self::with_ext(OpCode::SUPER_CALL, result, first_arg, Operand::None, &[nargs as u32])
-    }
-
-    // ── 其他带 ext 字 ──
-
-    pub fn define_accessor(home: Operand, get: Operand, set: Operand, key_idx: u32) -> Self {
-        Self::with_ext(OpCode::DEFINE_ACCESSOR, home, get, set, &[key_idx])
-    }
-
-    pub fn delete_prop_static(obj: Operand, const_idx: u32) -> Self {
-        Self::with_ext(OpCode::DELETE_PROP_STATIC, obj, obj, Operand::None, &[const_idx])
-    }
-
-    pub fn rest_object(rest: Operand, src: Operand, excluded_idx: u32) -> Self {
-        Self::with_ext(OpCode::REST_OBJECT, rest, src, Operand::None, &[excluded_idx])
-    }
-
-    /// TEMPLATE_STR：变长 ext。首字打包 `(segment_count<<16) | total_len_hint`，
-    /// 后续每 quasi 一项 `quasi_const_idx & 0x7FFF_FFFF`，其后若跟表达式再一项 `0x8000_0000 | expr_reg`。
-    pub fn template_str(dst: Operand, segment_count: u32, total_len_hint: u16, parts: &[u32]) -> Self {
-        let mut ext = SmallVec::with_capacity(2 + parts.len());
-        ext.push(((segment_count & 0xFFFF) << 16) | (total_len_hint as u32 & 0xFFFF));
-        ext.extend_from_slice(parts);
-        Self {
-            op: OpCode::TEMPLATE_STR,
-            rd: dst,
-            a: Operand::None,
-            b: Operand::None,
-            ext,
-        }
-    }
-
-    // ── 无 ext：立即数/索引指令（拆字是 lowering 职责）──
-
-    pub fn load_const(dst: Operand, idx: u16) -> Self {
-        Self::new(OpCode::LOAD_CONST, dst, Operand::Const(idx), Operand::None)
-    }
-
-    pub fn create_closure(dst: Operand, sub_idx: u16) -> Self {
-        Self::new(OpCode::CREATE_CLOSURE, dst, Operand::Imm(sub_idx), Operand::None)
-    }
-
-    // ── 跳转族：label 放 b 槽，offset 计算是 lowering 职责 ──
-
-    pub fn jmp(label: LabelId) -> Self {
-        Self::new(OpCode::JMP, Operand::None, Operand::None, Operand::Label(label))
-    }
-
-    pub fn jmp_if_false(cond_reg: u8, label: LabelId) -> Self {
-        Self::new(
-            OpCode::JMP_IF_FALSE,
-            Operand::Reg(cond_reg as u32),
-            Operand::None,
-            Operand::Label(label),
-        )
-    }
-
-    pub fn jmp_if_true(cond_reg: u8, label: LabelId) -> Self {
-        Self::new(
-            OpCode::JMP_IF_TRUE,
-            Operand::Reg(cond_reg as u32),
-            Operand::None,
-            Operand::Label(label),
-        )
-    }
-
-    pub fn jmp_if_nullish(cond_reg: u8, label: LabelId) -> Self {
-        Self::new(
-            OpCode::JMP_IF_NULLISH,
-            Operand::Reg(cond_reg as u32),
-            Operand::None,
-            Operand::Label(label),
-        )
-    }
-
-    pub fn try_begin(label: LabelId) -> Self {
-        Self::new(OpCode::TRY_BEGIN, Operand::None, Operand::None, Operand::Label(label))
-    }
-
-    pub fn try_finally_begin(label: LabelId) -> Self {
-        Self::new(OpCode::TRY_FINALLY_BEGIN, Operand::None, Operand::None, Operand::Label(label))
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn inst_new_has_empty_ext() {
-        let inst = Inst::new(OpCode::ADD, Operand::Reg(0), Operand::Reg(1), Operand::Reg(2));
-        assert!(inst.ext.is_empty());
-        assert_eq!(inst.op, OpCode::ADD);
-    }
-
-    #[test]
-    fn ic_instructions_carry_three_zero_ext_words() {
-        let insts = [
-            Inst::ic_get(Operand::Reg(1), Operand::Reg(2)),
-            Inst::ic_set(Operand::Reg(0), Operand::Reg(1), Operand::Reg(2)),
-            Inst::member_inc(Operand::Reg(0), Operand::Reg(1), Operand::Reg(2)),
-            Inst::member_dec(Operand::Reg(0), Operand::Reg(1), Operand::Reg(2)),
-            Inst::compound_member_add(Operand::Reg(0), Operand::Reg(1), Operand::Reg(2)),
-            Inst::compound_member_sub(Operand::Reg(0), Operand::Reg(1), Operand::Reg(2)),
-            Inst::compound_member_mul(Operand::Reg(0), Operand::Reg(1), Operand::Reg(2)),
-            Inst::compound_member_div(Operand::Reg(0), Operand::Reg(1), Operand::Reg(2)),
-            Inst::compound_member_mod(Operand::Reg(0), Operand::Reg(1), Operand::Reg(2)),
-            Inst::compound_member_exp(Operand::Reg(0), Operand::Reg(1), Operand::Reg(2)),
-        ];
-        for inst in &insts {
-            assert_eq!(inst.ext.as_slice(), &[0, 0, 0], "IC op {} must carry 3 zero ext words", inst.op);
-            assert!(inst.ext.len() == 3);
-        }
-    }
-
-    #[test]
-    fn call_instructions_carry_nargs() {
-        let call = Inst::call(Operand::Reg(0), Operand::Reg(1), Operand::Reg(2), 3);
-        assert_eq!(call.ext.as_slice(), &[3]);
-        assert_eq!(call.rd, Operand::Reg(0));
-        assert_eq!(call.a, Operand::Reg(1));
-        assert_eq!(call.b, Operand::Reg(2));
-
-        let native = Inst::call_native(Operand::Reg(0), Operand::Reg(1), Operand::Reg(2), 0);
-        assert_eq!(native.ext.as_slice(), &[0]);
-
-        let new_expr = Inst::new_expression(Operand::Reg(3), Operand::Reg(0), Operand::Reg(1), 2);
-        assert_eq!(new_expr.ext.as_slice(), &[2]);
-        assert_eq!(new_expr.rd, Operand::Reg(3));
-        assert_eq!(new_expr.a, Operand::Reg(0));
-
-        let super_call = Inst::super_call(Operand::Reg(3), Operand::Reg(1), 1);
-        assert_eq!(super_call.ext.as_slice(), &[1]);
-        assert_eq!(super_call.rd, Operand::Reg(3));
-        assert_eq!(super_call.a, Operand::Reg(1));
-    }
-
-    #[test]
-    fn single_ext_word_instructions() {
-        let accessor = Inst::define_accessor(Operand::Reg(0), Operand::Reg(1), Operand::Reg(2), 42);
-        assert_eq!(accessor.ext.as_slice(), &[42]);
-        assert_eq!(accessor.rd, Operand::Reg(0));
-        assert_eq!(accessor.a, Operand::Reg(1));
-        assert_eq!(accessor.b, Operand::Reg(2));
-
-        let rest = Inst::rest_object(Operand::Reg(0), Operand::Reg(1), 7);
-        assert_eq!(rest.ext.as_slice(), &[7]);
-    }
-
-    #[test]
-    fn load_const_and_create_closure_keep_semantic_operands() {
-        let lc = Inst::load_const(Operand::Reg(4), 300);
-        assert_eq!(lc.a, Operand::Const(300));
-        assert_eq!(lc.b, Operand::None);
-        assert!(lc.ext.is_empty());
-
-        let cc = Inst::create_closure(Operand::Reg(4), 5);
-        assert_eq!(cc.a, Operand::Imm(5));
-        assert_eq!(cc.b, Operand::None);
-        assert!(cc.ext.is_empty());
-    }
-
-    #[test]
-    fn jump_family_puts_label_in_b_slot() {
-        let jmp = Inst::jmp(9);
-        assert_eq!(jmp.b, Operand::Label(9));
-        assert_eq!(jmp.rd, Operand::None);
-
-        let cond = Inst::jmp_if_false(3, 9);
-        assert_eq!(cond.rd, Operand::Reg(3));
-        assert_eq!(cond.b, Operand::Label(9));
-
-        let true_jmp = Inst::jmp_if_true(3, 9);
-        assert_eq!(true_jmp.b, Operand::Label(9));
-
-        let nullish = Inst::jmp_if_nullish(3, 9);
-        assert_eq!(nullish.b, Operand::Label(9));
-
-        let try_begin = Inst::try_begin(9);
-        assert_eq!(try_begin.b, Operand::Label(9));
-        assert_eq!(try_begin.rd, Operand::None);
-
-        let try_fin = Inst::try_finally_begin(9);
-        assert_eq!(try_fin.b, Operand::Label(9));
-    }
-
-    #[test]
-    fn template_str_packs_segment_count_and_hint() {
-        let inst = Inst::template_str(Operand::Reg(1), 3, 10, &[0x1234, 0x8000_0000 | 5]);
-        assert_eq!(inst.op, OpCode::TEMPLATE_STR);
-        assert_eq!(inst.rd, Operand::Reg(1));
-        assert_eq!(inst.ext.len(), 3);
-        assert_eq!(inst.ext[0], (3 << 16) | 10);
-        assert_eq!(inst.ext[1], 0x1234);
-        assert_eq!(inst.ext[2], 0x8000_0000 | 5);
-    }
-}

crates/oxide_compiler/src/ir/lower.rs

@@ -1,152 +0,0 @@
-//! IRFunction → CompiledModule 等价转换。
-//!
-//! 字节码格式（4 字节 u32 + 扩展字）与现状逐指令一致（D-13 锚）。
-//! label 用前缀和：`label_pos` 记 Inst 下标，平铺时维护 inst→instr 映射，
-//! 跳转 offset 以 Instr（含 ext 字）为单位（D-17）。
-
-use oxide_bytecode::module::CompiledModule;
-use oxide_bytecode::opcode::{self, OpCode};
-
-use super::inst::Inst;
-use super::operand::Operand;
-use super::IRFunction;
-
-/// IRFunction → CompiledModule。错误消息与现状（退役前 compiler.rs）逐字一致。
-pub fn lower(f: &IRFunction) -> Result<CompiledModule, String> {
-    // 溢出检查 1：寄存器（仅 Operand::Reg 变体；This/NewTarget 是语义操作数，映射 254/255 合法）
-    if f.reg_overflow {
-        return Err("RangeError: function body uses too many registers (max 253)".into());
-    }
-    for inst in &f.insts {
-        for o in [&inst.rd, &inst.a, &inst.b] {
-            if let Operand::Reg(r) = o {
-                if *r > 253 {
-                    return Err("RangeError: function body uses too many registers (max 253)".into());
-                }
-            }
-        }
-    }
-
-    // 溢出检查 2：常量池
-    if f.const_overflow || f.constants.len() > u16::MAX as usize {
-        return Err("RangeError: too many constants".into());
-    }
-
-    let mut instrs: Vec<u32> = Vec::new();
-    let mut inst_to_instr: Vec<usize> = Vec::with_capacity(f.insts.len());
-    // (当前指令的起始 Instr index, label id)
-    let mut jumps: Vec<(usize, u32)> = Vec::new();
-
-    for inst in &f.insts {
-        inst_to_instr.push(instrs.len());
-        encode_inst(inst, &mut instrs, &mut jumps)?;
-    }
-
-    // 跳转回填：offset = 目标 Instr - 当前 Instr（前缀和，D-17）
-    for (instr_idx, label) in jumps {
-        let target_inst = f
-            .label_pos
-            .get(label as usize)
-            .and_then(|p| *p)
-            .ok_or_else(|| format!("Label {label} not found in bytecode map"))?;
-        if target_inst >= inst_to_instr.len() {
-            return Err(format!("Label {label} not found in bytecode map"));
-        }
-        let target_instr = inst_to_instr[target_inst];
-        let offset = target_instr as isize - instr_idx as isize;
-        if offset < i16::MIN as isize || offset > i16::MAX as isize {
-            return Err("RangeError: jump offset out of range".into());
-        }
-        let offset = offset as i16;
-        let existing = instrs[instr_idx];
-        let op = opcode::opcode(existing);
-        let rd = opcode::rd(existing);
-        instrs[instr_idx] = opcode::encode(op, rd, (offset as u16 & 0xFF) as u8, ((offset as u16 >> 8) & 0xFF) as u8);
-    }
-
-    let mut sub_modules = Vec::with_capacity(f.nested.len());
-    for nested in &f.nested {
-        sub_modules.push(lower(nested)?);
-    }
-
-    Ok(CompiledModule {
-        bytecode: instrs,
-        constants: f.constants.clone(),
-        n_registers: f.n_registers,
-        n_args: f.param_layout.count as u8,
-        param_base: f.param_layout.base as u8,
-        builtin_reg_map: f.builtin_reg_map.clone(),
-        sub_modules,
-        is_arrow: f.is_arrow,
-        captured_this_const_idx: f.captured_this_const_idx,
-        function_name: f.function_name.clone(),
-        is_class_constructor: f.is_class_constructor,
-        is_derived_constructor: f.is_derived_constructor,
-        needs_home_object: f.needs_home_object,
-        upvalue_captures: f.upvalue_captures.clone(),
-        cells_needed: f.cells_needed,
-    })
-}
-
-/// Operand → u8 槽位。Const/Imm 在 a 槽走拆字（operand_pair_to_u8）；
-/// 出现在 b/rd 槽时按低字节直写（const_flag、cell_idx、uv_idx 等一字节立即数）。
-fn operand_to_u8(o: &Operand) -> u8 {
-    match o {
-        Operand::Reg(r) => *r as u8,
-        Operand::This => 254,
-        Operand::NewTarget => 255,
-        Operand::Imm(v) => (v & 0xFF) as u8,
-        Operand::Const(v) => (v & 0xFF) as u8,
-        Operand::Label(_) | Operand::None => 0,
-    }
-}
-
-/// 普通指令的 a/b 槽：a 槽的 Const/Imm 拆 lo/hi（对应 LOAD_CONST/CREATE_CLOSURE 布局）。
-fn operand_pair_to_u8(a: &Operand, b: &Operand) -> (u8, u8) {
-    match a {
-        Operand::Const(idx) => ((idx & 0xFF) as u8, (idx >> 8) as u8),
-        Operand::Imm(v) => ((v & 0xFF) as u8, (v >> 8) as u8),
-        _ => (operand_to_u8(a), operand_to_u8(b)),
-    }
-}
-
-fn encode_inst(inst: &Inst, instrs: &mut Vec<u32>, jumps: &mut Vec<(usize, u32)>) -> Result<(), String> {
-    if is_jump_op(inst.op) {
-        let label = match inst.b {
-            Operand::Label(id) => id,
-            _ => return Err(format!("jump op {:?} requires Label operand in b slot", inst.op)),
-        };
-        let cond = operand_to_u8(&inst.rd);
-        let start = instrs.len();
-        let instr = match inst.op {
-            OpCode::JMP => opcode::encode_jmp(0),
-            OpCode::JMP_IF_FALSE => opcode::encode_jmp_if_false(cond, 0),
-            OpCode::JMP_IF_TRUE => opcode::encode_jmp_if_true(cond, 0),
-            OpCode::JMP_IF_NULLISH => opcode::encode_jmp_if_nullish(cond, 0),
-            OpCode::TRY_BEGIN => opcode::encode_try_begin(0),
-            OpCode::TRY_FINALLY_BEGIN => opcode::encode_try_finally_begin(0),
-            _ => unreachable!("is_jump_op mismatch"),
-        };
-        instrs.push(instr);
-        jumps.push((start, label));
-        return Ok(());
-    }
-
-    let rd = operand_to_u8(&inst.rd);
-    let (a, b) = operand_pair_to_u8(&inst.a, &inst.b);
-    instrs.push(opcode::encode(inst.op, rd, a, b));
-    instrs.extend_from_slice(&inst.ext);
-    Ok(())
-}
-
-fn is_jump_op(op: OpCode) -> bool {
-    matches!(
-        op,
-        OpCode::JMP
-            | OpCode::JMP_IF_FALSE
-            | OpCode::JMP_IF_TRUE
-            | OpCode::JMP_IF_NULLISH
-            | OpCode::TRY_BEGIN
-            | OpCode::TRY_FINALLY_BEGIN
-    )
-}

crates/oxide_compiler/src/ir/mod.rs

@@ -1,90 +0,0 @@
-//! IR 中间表示：AST→IR→字节码 流水线的程序表示。
-//!
-//! 单一程序表示（D-01），分域组合（D-02）：
-//! - code: 指令流 + label 位置
-//! - data: 常量池
-//! - bindings: 参数布局
-//! - builtins: 内置全局 → 寄存器
-//! - closures: 闭包捕获 + cell
-//! - meta: 函数元信息 + 溢出证据
-//! - nested: 子函数（递归 IR，替代 sub_modules）
-//!
-//! 分析视图（CFG/LiveInfo/AllocMap）是 pass 输出，不住进 IR。
-
-pub mod inst;
-pub mod lower;
-pub mod operand;
-
-use oxide_bytecode::module::{Constant, UpvalueCapture};
-
-use self::inst::Inst;
-
-/// 参数段布局：base 起 count 个寄存器连续（VM 调用契约），RegAlloc 输入。
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
-pub struct ParamLayout {
-    pub base: u32,
-    pub count: u32,
-}
-
-/// 单函数 IR。分域组合，嵌套封顶两层。
-#[derive(Debug, Clone)]
-pub struct IRFunction {
-    // code 域
-    pub insts: Vec<Inst>,
-    /// label id → 指令下标。id 连续递增，Vec 索引即 id；写入前须扩容。
-    pub label_pos: Vec<Option<usize>>,
-    pub label_count: u32,
-    // data 域
-    pub constants: Vec<Constant>,
-    // bindings 域
-    pub param_layout: ParamLayout,
-    // builtins 域
-    pub builtin_reg_map: Vec<(String, u8)>,
-    // closures 域
-    pub upvalue_captures: Vec<UpvalueCapture>,
-    pub cells_needed: u8,
-    // meta 域
-    pub n_registers: u8,
-    pub is_arrow: bool,
-    pub is_class_constructor: bool,
-    pub is_derived_constructor: bool,
-    pub needs_home_object: bool,
-    pub captured_this_const_idx: u16,
-    pub function_name: Option<String>,
-    /// emit 侧溢出证据，lowering 读标志报错（D-20）。
-    pub reg_overflow: bool,
-    pub const_overflow: bool,
-    // nested 域
-    pub nested: Vec<IRFunction>,
-}
-
-impl IRFunction {
-    pub fn new() -> Self {
-        Self {
-            insts: Vec::new(),
-            label_pos: Vec::new(),
-            label_count: 0,
-            constants: Vec::new(),
-            param_layout: ParamLayout { base: 0, count: 0 },
-            builtin_reg_map: Vec::new(),
-            upvalue_captures: Vec::new(),
-            cells_needed: 0,
-            n_registers: 0,
-            is_arrow: false,
-            is_class_constructor: false,
-            is_derived_constructor: false,
-            needs_home_object: false,
-            captured_this_const_idx: 0,
-            function_name: None,
-            reg_overflow: false,
-            const_overflow: false,
-            nested: Vec::new(),
-        }
-    }
-}
-
-impl Default for IRFunction {
-    fn default() -> Self {
-        Self::new()
-    }
-}

crates/oxide_compiler/src/ir/operand.rs

@@ -1,22 +0,0 @@
-//! 类型安全操作数。IR 中不出现裸寄存器下标。
-//!
-//! - `Reg(u32)`：寄存器。本阶段存物理号（≤253）；254/255 为 VM 保留，语义由 `This`/`NewTarget` 表达
-//! - `Const(u16)`：常量池下标
-//! - `Label(u32)`：跳转目标（`LabelId`）
-//! - `Imm(u16)`：立即数
-//! - `This` / `NewTarget`：语义化特殊寄存器，由 lowering 映射物理 254/255（IR 中禁止裸下标）
-//! - `None`：操作数槽未使用
-
-/// 统一跳转目标标识（取代语义化 `Label` 枚举）。
-pub type LabelId = u32;
-
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
-pub enum Operand {
-    Reg(u32),
-    Const(u16),
-    Label(u32),
-    Imm(u16),
-    This,
-    NewTarget,
-    None,
-}

crates/oxide_compiler/src/lib.rs

@@ -7,7 +7,6 @@ pub mod compiler_log;
 pub mod emit_ctx;
 pub mod expr;
 pub mod hash;
-pub mod ir;
 pub mod prepass;
 pub mod shared;
 pub mod stmt;

crates/oxide_compiler/src/shared/binding.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{CompileCtx, Compiler};
-use crate::ir::inst::Inst;
-use crate::ir::operand::Operand;
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::Operand;
 use oxide_bytecode::module::Constant;
 use oxide_bytecode::opcode::OpCode;
 use oxide_parser::{

crates/oxide_compiler/src/shared/chain.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{CompileCtx, Compiler};
-use crate::ir::inst::Inst;
-use crate::ir::operand::{LabelId, Operand};
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::{LabelId, Operand};
 use oxide_bytecode::module::Constant;
 use oxide_bytecode::opcode::OpCode;
 use oxide_parser::{ChainElement, Expression, LogicalOperator, PropertyKey};

crates/oxide_compiler/src/shared/class_field.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{CompileCtx, Compiler};
-use crate::ir::inst::Inst;
-use crate::ir::operand::Operand;
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::Operand;
 use oxide_bytecode::opcode::OpCode;
 use oxide_parser::{Expression, PropertyKey};
 

crates/oxide_compiler/src/shared/class_key.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{CompileCtx, Compiler};
-use crate::ir::inst::Inst;
-use crate::ir::operand::Operand;
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::Operand;
 use oxide_bytecode::module::Constant;
 use oxide_parser::PropertyKey;
 

crates/oxide_compiler/src/stmt/basic/break_continue.rs

@@ -1,5 +1,5 @@
 use crate::compiler::{CompileCtx, Compiler};
-use crate::ir::inst::Inst;
+use oxide_ir::inst::Inst;
 
 impl Compiler {
     pub(crate) fn emit_break_statement(

crates/oxide_compiler/src/stmt/basic/return_stmt.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{CompileCtx, Compiler};
-use crate::ir::inst::Inst;
-use crate::ir::operand::Operand;
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::Operand;
 use oxide_bytecode::opcode::OpCode;
 use oxide_parser::Statement;
 

crates/oxide_compiler/src/stmt/control.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{CompileCtx, Compiler};
-use crate::ir::inst::Inst;
-use crate::ir::operand::Operand;
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::Operand;
 use oxide_bytecode::module::Constant;
 use oxide_bytecode::opcode::OpCode;
 use oxide_parser::Statement;

crates/oxide_compiler/src/stmt/declaration/class_decl.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{CompileCtx, Compiler};
-use crate::ir::inst::Inst;
-use crate::ir::operand::Operand;
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::Operand;
 use oxide_bytecode::opcode::OpCode;
 use oxide_parser::{Statement, VariableDeclarationKind};
 

crates/oxide_compiler/src/stmt/declaration/function_decl.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{CompileCtx, Compiler, ParamSpec};
-use crate::ir::inst::Inst;
-use crate::ir::operand::Operand;
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::Operand;
 use oxide_bytecode::opcode::OpCode;
 use oxide_parser::Statement;
 

crates/oxide_compiler/src/stmt/declaration/var.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{CompileCtx, Compiler};
-use crate::ir::inst::Inst;
-use crate::ir::operand::Operand;
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::Operand;
 use oxide_bytecode::module::Constant;
 use oxide_bytecode::opcode::OpCode;
 use oxide_parser::{BindingPattern, Expression, Statement, VariableDeclarationKind};

crates/oxide_compiler/src/stmt/exception/throw.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{CompileCtx, Compiler};
-use crate::ir::inst::Inst;
-use crate::ir::operand::Operand;
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::Operand;
 use oxide_bytecode::opcode::OpCode;
 use oxide_parser::Statement;
 

crates/oxide_compiler/src/stmt/exception/try_catch.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{CompileCtx, Compiler};
-use crate::ir::inst::Inst;
-use crate::ir::operand::Operand;
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::Operand;
 use oxide_bytecode::opcode::OpCode;
 use oxide_parser::{Statement, VariableDeclarationKind};
 

crates/oxide_compiler/src/stmt/iteration/do_while.rs

@@ -1,5 +1,5 @@
 use crate::compiler::{CompileCtx, Compiler};
-use crate::ir::inst::Inst;
+use oxide_ir::inst::Inst;
 use oxide_parser::Statement;
 
 impl Compiler {

crates/oxide_compiler/src/stmt/iteration/for_.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{CompileCtx, Compiler};
-use crate::ir::inst::Inst;
-use crate::ir::operand::Operand;
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::Operand;
 use oxide_bytecode::module::Constant;
 use oxide_bytecode::opcode::OpCode;
 use oxide_parser::{BindingPattern, ForStatementInit, Statement, VariableDeclarationKind};

crates/oxide_compiler/src/stmt/iteration/for_in.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{CompileCtx, Compiler};
-use crate::ir::inst::Inst;
-use crate::ir::operand::Operand;
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::Operand;
 use oxide_bytecode::opcode::OpCode;
 use oxide_parser::{ForStatementLeft, Statement, VariableDeclarationKind};
 

crates/oxide_compiler/src/stmt/iteration/for_of.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{CompileCtx, Compiler};
-use crate::ir::inst::Inst;
-use crate::ir::operand::Operand;
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::Operand;
 use oxide_bytecode::opcode::OpCode;
 use oxide_parser::{ForStatementLeft, Statement};
 

crates/oxide_compiler/src/stmt/iteration/while_loop.rs

@@ -1,5 +1,5 @@
 use crate::compiler::{CompileCtx, Compiler};
-use crate::ir::inst::Inst;
+use oxide_ir::inst::Inst;
 use oxide_parser::Statement;
 
 impl Compiler {

crates/oxide_compiler/src/stmt/switch.rs

@@ -1,6 +1,6 @@
 use crate::compiler::{CompileCtx, Compiler};
-use crate::ir::inst::Inst;
-use crate::ir::operand::Operand;
+use oxide_ir::inst::Inst;
+use oxide_ir::operand::Operand;
 use oxide_bytecode::opcode::OpCode;
 use oxide_parser::Statement;