test: 内联测试移入 oxide_dce 集成测试

crates/oxide_dce/src/lib.rs

@@ -56,61 +56,3 @@ pub fn dce_precise(f: &mut IRFunction, live: &LiveInfo) {
     // mark-sweep 一次性重建
     rebuild::pass_c_sweep(f, &keep);
 }
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use oxide_bytecode::opcode::OpCode;
-    use oxide_ir::inst::Inst;
-    use oxide_ir::operand::Operand;
-
-    /// 空函数退化：insts 空时 dce 直接返回，状态不变。
-    #[test]
-    fn empty_function_unchanged() {
-        let mut f = IRFunction::new();
-        dce(&mut f);
-        assert!(f.insts.is_empty());
-        assert!(f.label_pos.is_empty());
-        assert_eq!(f.label_count, 0);
-    }
-
-    /// 幂等性：dce 两次结果一致（不动点后无二次改写）。
-    #[test]
-    fn dce_is_idempotent() {
-        let mut f = IRFunction::new();
-        f.insts.push(Inst::load_const(Operand::Reg(1), 0)); // 0: 死
-        f.insts
-            .push(Inst::new(OpCode::ADD, Operand::Reg(2), Operand::Reg(1), Operand::Reg(1))); // 1: 死
-        f.insts.push(Inst::load_const(Operand::Reg(0), 1)); // 2: 存活（CALL 保活 r0）
-        f.insts.push(Inst::call(Operand::Reg(0), Operand::Reg(0), Operand::Reg(0), 0)); // 3
-        f.insts
-            .push(Inst::new(OpCode::RETURN, Operand::Reg(5), Operand::None, Operand::None)); // 4
-        f.label_pos = vec![Some(0)];
-
-        dce(&mut f);
-        let once_insts = f.insts.clone();
-        let once_labels = f.label_pos.clone();
-        dce(&mut f);
-        assert_eq!(f.insts, once_insts, "二次 dce 后 insts 不变");
-        assert_eq!(f.label_pos, once_labels, "二次 dce 后 label_pos 不变");
-    }
-
-    /// if/else 双分支完整链路：Jump + Fallthrough 双出边全可达，指令全保留，label 重映射正确。
-    #[test]
-    fn if_else_both_branches_reachable_kept() {
-        let mut f = IRFunction::new();
-        f.insts.push(Inst::jmp_if_false(0, 0)); // 0: cond → L0(else)
-        f.insts.push(Inst::call(Operand::Reg(2), Operand::Reg(0), Operand::Reg(3), 1)); // 1: then
-        f.insts.push(Inst::jmp(1)); // 2: → L1(end)
-        f.insts.push(Inst::call(Operand::Reg(4), Operand::Reg(0), Operand::Reg(3), 1)); // 3: else
-        f.insts
-            .push(Inst::new(OpCode::RETURN, Operand::Reg(5), Operand::None, Operand::None)); // 4
-        f.label_pos = vec![Some(3), Some(4)];
-        f.label_count = 2;
-
-        dce(&mut f);
-        assert_eq!(f.insts.len(), 5, "双分支全保留");
-        assert_eq!(f.label_pos, vec![Some(3), Some(4)], "存活 label 重映射到新下标");
-        assert_eq!(f.label_count, 2, "label_count 保持原值，不参与重建");
-    }
-}