imxyy1soope1/nixjit
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feat: lots of optimization

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* allocate vm stack on the stack
* use Rc instead of Arc
* optimize recursive attribute set
This commit is contained in:
imxyy_soope_
2025-05-11 12:57:29 +08:00
parent 07b486848f
commit 05e82d4021
12 changed files with 137 additions and 111 deletions
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41
src/vm/mod.rs
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@@ -1,5 +1,5 @@
use std::cell::OnceCell;
use std::sync::Arc;
use std::rc::Rc;
use crate::builtins::env;
use crate::bytecode::{BinOp, OpCode, OpCodes, Program, UnOp};
@@ -65,11 +65,11 @@ impl<'vm> VM<'vm> {
unsafe { &*(&self.funcs[idx] as *const _) }
}
pub fn eval(&self, opcodes: OpCodes, env: Arc<Env<'vm>>) -> Result<Value<'vm>> {
pub fn eval(&self, opcodes: OpCodes, env: Rc<Env<'vm>>) -> Result<Value<'vm>> {
let mut stack = Stack::<STACK_SIZE>::new();
let mut iter = opcodes.into_iter();
while let Some(opcode) = iter.next() {
let jmp = self.single_op(opcode, &mut stack, env.clone())?;
let jmp = self.single_op(opcode, &mut stack, &env)?;
for _ in 0..jmp {
iter.next().unwrap();
}
@@ -85,15 +85,16 @@ impl<'vm> VM<'vm> {
&self,
opcode: OpCode,
stack: &'s mut Stack<'vm, CAP>,
env: Arc<Env<'vm>>,
env: &Rc<Env<'vm>>,
) -> Result<usize>
{
match opcode {
OpCode::Illegal => panic!("illegal opcode"),
OpCode::Const { value } => stack.push(Value::Const(value))?,
OpCode::LoadThunk { idx } => {
self.thunks[idx].capture(env);
stack.push(Value::Thunk(self.thunks[idx].clone()))?
let thunk = self.get_thunk(idx);
thunk.capture(env.clone());
stack.push(Value::ThunkRef(self.get_thunk(idx)))?
}
OpCode::LoadValue { idx } => {
stack.push(self.get_thunk(idx).force(self)?)?;
@@ -123,7 +124,7 @@ impl<'vm> VM<'vm> {
}
OpCode::Func { idx } => {
let func = self.get_func(idx);
func.env.get_or_init(|| env.captured());
func.env.get_or_init(|| env.clone().captured());
stack.push(Value::Func(func))?;
}
OpCode::UnOp { op } => {
@@ -167,13 +168,13 @@ impl<'vm> VM<'vm> {
OpCode::AttrSet => {
stack.push(Value::AttrSet(AttrSet::empty()))?;
}
OpCode::RecAttrSet => {
let new = env.enter_rec();
stack.push(Value::RecAttrSet(RecAttrSet::new(new)))?;
}
OpCode::FinalizeRec => {
env.enter(stack.tos()?.clone().unwrap_attr_set().into_inner());
stack.tos_mut()?.as_mut().unwrap_attr_set().capture(env.clone());
},
OpCode::PushStaticAttr { name } => {
let val = stack.pop();
stack.tos_mut()?.push_attr(Symbol::new(name), val);
stack.tos_mut()?.push_attr(Symbol::new(name.clone()), val);
}
OpCode::PushDynamicAttr => {
let val = stack.pop();
@@ -183,21 +184,21 @@ impl<'vm> VM<'vm> {
stack.tos_mut()?.push_attr(sym, val);
}
OpCode::Select { sym } => {
stack.tos_mut()?.force(self)?.select(Symbol::new(sym))?;
stack.tos_mut()?.force(self)?.select(&Symbol::new(sym))?;
}
OpCode::SelectOrDefault { sym } => {
let default = stack.pop();
stack
.tos_mut()?
.force(self)?
.select_with_default(Symbol::new(sym), default)?;
.select_with_default(&Symbol::new(sym), default)?;
}
OpCode::SelectDynamic => {
let mut val = stack.pop();
val.force(self)?;
val.coerce_to_string();
let sym = val.unwrap_const().unwrap_string().into();
stack.tos_mut()?.force(self)?.select(sym)?;
stack.tos_mut()?.force(self)?.select(&sym)?;
}
OpCode::SelectDynamicOrDefault => {
let default = stack.pop();
@@ -208,26 +209,26 @@ impl<'vm> VM<'vm> {
stack
.tos_mut()?
.force(self)?
.select_with_default(sym, default)?;
.select_with_default(&sym, default)?;
}
OpCode::HasAttr { sym } => {
stack.tos_mut()?.force(self)?.has_attr(Symbol::new(sym));
stack.tos_mut()?.force(self)?.has_attr(&Symbol::new(sym));
}
OpCode::HasDynamicAttr => {
let mut val = stack.pop();
val.coerce_to_string();
let sym = val.unwrap_const().unwrap_string().into();
stack.tos_mut()?.force(self)?.has_attr(sym);
stack.tos_mut()?.force(self)?.has_attr(&sym);
}
OpCode::LookUp { sym } => {
let sym = Symbol::new(sym);
stack.push(
env.lookup(Symbol::new(sym.clone()))
env.lookup(&sym)
.ok_or_else(|| Error::EvalError(format!(r#""{sym}" not found"#)))?,
)?;
}
OpCode::EnterEnv => match stack.pop() {
Value::AttrSet(attrs) => env.enter(attrs.into_inner()),
Value::RecAttrSet(attrs) => env.enter(attrs.into_inner()),
_ => unreachable!(),
},
OpCode::LeaveEnv => {