mirror of
https://github.com/pjh456/OxideJS.git
synced 2026-10-23 18:21:13 +08:00
92 lines
3.3 KiB
Rust
92 lines
3.3 KiB
Rust
//! 嵌套父槽引用回归：nested 子模块直接槽引用父槽，RegAlloc on/off 运行时等价。
|
||
//!
|
||
//! 父侧 collect_escaped 保证父不移动槽；但子模块自身 alloc 时引用父槽的
|
||
//! LOAD_VAR.a / STORE_VAR.rd 曾被当作子模块自己的 vreg 染色移走（→ 读错物理槽，
|
||
//! on={object} vs off=42）。修复：graph.rs/rewrite.rs 对称 collect_own_escaped。
|
||
//! 槽号 ≥ inherited_reg_start（param_layout.base）时触发，故用高压力变量推高槽号。
|
||
|
||
use std::sync::Arc;
|
||
|
||
use oxide_vm::vm::Vm;
|
||
|
||
fn run_source(src: &str, regalloc: bool) -> (bool, String) {
|
||
let allocator = oxide_parser::Allocator::default();
|
||
let program = match oxide_parser::parse(&allocator, src) {
|
||
Ok(p) => p,
|
||
Err(e) => return (false, format!("parse error: {}", e[0].message)),
|
||
};
|
||
let mut ir = match oxide_emit::Emitter::new().emit_program(&program, false, false) {
|
||
Ok(i) => i,
|
||
Err(e) => return (false, format!("emit error: {e}")),
|
||
};
|
||
let _ = oxide_dce::dce(&mut ir);
|
||
if regalloc {
|
||
let cfg = oxide_cfg::build_cfg(&ir);
|
||
let live = oxide_liveness::liveness(&ir, &cfg);
|
||
oxide_dce::dce_precise(&mut ir, &live);
|
||
let cfg2 = oxide_cfg::build_cfg(&ir);
|
||
let live2 = oxide_liveness::liveness(&ir, &cfg2);
|
||
if let Err(e) = oxide_regalloc::alloc(&mut ir, &live2) {
|
||
return (false, format!("alloc error: {e}"));
|
||
}
|
||
}
|
||
let module = match oxide_ir::lower::lower(&ir) {
|
||
Ok(m) => m,
|
||
Err(e) => return (false, format!("lower error: {e}")),
|
||
};
|
||
let mut vm = Vm::new();
|
||
match vm.run(&Arc::new(module)) {
|
||
Ok(v) => (true, v.to_string()),
|
||
Err(e) => (false, e),
|
||
}
|
||
}
|
||
|
||
fn pressure(n: usize) -> String {
|
||
let mut src = String::new();
|
||
for i in 0..n {
|
||
src.push_str(&format!("var v{i} = {i}; "));
|
||
}
|
||
src
|
||
}
|
||
|
||
#[test]
|
||
fn field_reads_outer_40_pressure() {
|
||
let src = format!("{}var a = 42; class C {{ p = a; }} new C().p;", pressure(40));
|
||
let off = run_source(&src, false);
|
||
let on = run_source(&src, true);
|
||
assert_eq!(on, off, "field 读外层 40 压力: off={off:?} on={on:?}");
|
||
}
|
||
|
||
#[test]
|
||
fn method_reads_outer_40_pressure() {
|
||
let src = format!("{}var a = 42; class C {{ m() {{ return a; }} }} new C().m();", pressure(40));
|
||
let off = run_source(&src, false);
|
||
let on = run_source(&src, true);
|
||
assert_eq!(on, off, "method 读外层 40 压力: off={off:?} on={on:?}");
|
||
}
|
||
|
||
#[test]
|
||
fn field_reads_outer_30_pressure() {
|
||
let src = format!("{}var a = 42; class C {{ p = a; }} new C().p;", pressure(30));
|
||
let off = run_source(&src, false);
|
||
let on = run_source(&src, true);
|
||
assert_eq!(on, off, "field 读外层 30 压力: off={off:?} on={on:?}");
|
||
}
|
||
|
||
#[test]
|
||
fn field_reads_outer_25_pressure() {
|
||
let src = format!("{}var a = 42; class C {{ p = a; }} new C().p;", pressure(25));
|
||
let off = run_source(&src, false);
|
||
let on = run_source(&src, true);
|
||
assert_eq!(on, off, "field 读外层 25 压力: off={off:?} on={on:?}");
|
||
}
|
||
|
||
#[test]
|
||
fn field_reads_outer_hi_last_40_pressure() {
|
||
let mut src = pressure(40);
|
||
src.push_str("var a_hi = 777; class C { p = a_hi; } new C().p;");
|
||
let off = run_source(&src, false);
|
||
let on = run_source(&src, true);
|
||
assert_eq!(on, off, "field 读外层末位 40 压力: off={off:?} on={on:?}");
|
||
}
|