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Improve infer

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This commit is contained in:
UditDey
2026-09-13 16:49:36 +00:00
parent 61c4971fa6
commit 5d687e308e
1 changed files with 132 additions and 101 deletions
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compiler/src/infer.rs
+77 -46
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@@ -12,7 +12,6 @@ use crate::{
pub enum FnKind {
Id(usize),
DefineField(AtomRef),
PutField(AtomRef),
}
#[derive(Debug, Clone, Hash, PartialEq, Eq)]
@@ -42,16 +41,44 @@ fn join_ty(a: &Type, b: &Type) -> Type {
}
}
fn get_field(ty: &Type, field: AtomRef, cache: &mut TypeCache) -> Type {
match ty {
Type::ReturnOf((fn_kind, args)) => match fn_kind {
FnKind::Id(id) => {
let ret_ty = cache
.get(&InferRequest {
fn_id: *id,
arg_types: args.clone(),
})
.unwrap()
.ret_type
.clone();
get_field(&ret_ty, field, cache)
}
FnKind::DefineField(atom) => {
if *atom == field {
args[0].clone()
} else {
Type::Undefined
}
}
},
Type::Any => Type::Any,
_ => Type::Undefined,
}
}
#[derive(Debug, Hash, PartialEq, Eq)]
pub struct InferRequest {
fn_id: usize,
arg_types: Vec<Type>,
pub fn_id: usize,
pub arg_types: Vec<Type>,
}
#[derive(Debug)]
pub struct InferResult {
val_types: Vec<Type>,
ret_type: Type,
pub val_types: Vec<Type>,
pub ret_type: Type,
}
pub type TypeCache = HashMap<InferRequest, InferResult>;
@@ -64,55 +91,44 @@ pub fn infer_types(reg_fns: &[RegFn], atoms: &[Atom]) -> TypeCache {
.unwrap();
let mut cache = TypeCache::with_capacity(reg_fns.len());
let mut worklist = vec![];
worklist.push(InferRequest {
let req = InferRequest {
fn_id: main_fn_id,
arg_types: vec![],
});
};
while let Some(req) = worklist.pop() {
match walk_fn(&req, reg_fns, &mut cache) {
Ok(res) => {
cache.insert(req, res);
}
Err(new_req) => {
worklist.push(new_req);
worklist.push(req);
}
}
}
walk_fn(req, reg_fns, &mut cache);
cache
}
fn walk_fn(
req: &InferRequest,
reg_fns: &[RegFn],
cache: &mut TypeCache,
) -> Result<InferResult, InferRequest> {
fn walk_fn(req: InferRequest, reg_fns: &[RegFn], cache: &mut TypeCache) {
use OpCode::*;
let f = &reg_fns[req.fn_id];
let mut val_types = vec![Type::Unknown; f.val_count];
let mut ret_type = Type::Unknown;
for instr in &f.code {
for block in &f.blocks {
let code = &f.code[block.start..block.end];
let code = code.iter().chain(&block.postfix);
for instr in code {
let is_ret = matches!(instr.op, Return | ReturnAsync | ReturnUndef);
if instr.dsts.is_empty() && !is_ret {
continue;
}
// TODO: Some of these ops may not every show up by this point
let ty = match instr.op {
// ──────────────────────────────────── Literals ────────────────────────────────────
PushMinus1 | Push0 | Push1 | Push2 | Push3 | Push4 | Push5 | Push6 | Push7 | PushI8
| PushI16 | PushI32 => Type::Int,
PushMinus1 | Push0 | Push1 | Push2 | Push3 | Push4 | Push5 | Push6 | Push7
| PushI8 | PushI16 | PushI32 => Type::Int,
PushTrue | PushFalse => Type::Bool,
// TODO: Fclosure will disappear soon
PushConst | PushConst8 | Fclosure | Fclosure8 => match instr.imm {
PushConst | PushConst8 => match instr.imm {
ImmOperand::Const(k) => match f.cpool.get(k as usize) {
Some(JsValue::Int(_)) => Type::Int,
Some(JsValue::Float(_)) => Type::Float,
@@ -124,7 +140,7 @@ fn walk_fn(
},
// ─────────────────────────────────── Arithmetic ───────────────────────────────────
Add | Sub | Mul | Div | Mod | Pow => {
Add | Sub | Mul | Mod | Pow => {
match (&val_types[instr.args[0]], &val_types[instr.args[1]]) {
(Type::Int, Type::Int) => Type::Int,
(Type::Float, Type::Float)
@@ -133,25 +149,24 @@ fn walk_fn(
_ => Type::Any,
}
}
Neg | Plus | Inc | Dec => match val_types[instr.args[0]] {
Type::Int => Type::Int,
Type::Float => Type::Float,
_ => Type::Any,
},
Div => Type::Float,
Lt | Lte | Gt | Gte | Eq | Neq | StrictEq | StrictNeq | Not => Type::Bool,
// ────────────────────────────────── Value Movers ──────────────────────────────────
Dup | SetLoc => val_types[instr.args[0]].clone(),
Dup | SetLoc | SetName => val_types[instr.args[0]].clone(),
// ──────────────────────────────────── Arguments ───────────────────────────────────
OpCode::GetArg0 => req.arg_types.first().cloned().unwrap_or(Type::Undefined),
OpCode::GetArg1 => req.arg_types.get(1).cloned().unwrap_or(Type::Undefined),
OpCode::GetArg2 => req.arg_types.get(2).cloned().unwrap_or(Type::Undefined),
OpCode::GetArg3 => req.arg_types.get(3).cloned().unwrap_or(Type::Undefined),
OpCode::GetArg => match instr.imm {
GetArg0 => req.arg_types.first().cloned().unwrap_or(Type::Undefined),
GetArg1 => req.arg_types.get(1).cloned().unwrap_or(Type::Undefined),
GetArg2 => req.arg_types.get(2).cloned().unwrap_or(Type::Undefined),
GetArg3 => req.arg_types.get(3).cloned().unwrap_or(Type::Undefined),
GetArg => match instr.imm {
ImmOperand::Arg(k) => req
.arg_types
.get(k as usize)
@@ -161,9 +176,9 @@ fn walk_fn(
},
// ──────────────────────────────────── Objects ─────────────────────────────────────
OpCode::Object => Type::Empty,
OpCode::DefineField => {
let atom = match instr.imm {
Object => Type::Empty,
DefineField => {
let field = match instr.imm {
ImmOperand::Atom(atom) => atom,
_ => unreachable!(),
};
@@ -171,14 +186,26 @@ fn walk_fn(
let arg0_ty = val_types[instr.args[0]].clone();
let arg1_ty = val_types[instr.args[1]].clone();
ReturnOf((FnKind::DefineField(atom), vec![arg0_ty, arg1_ty]))
ReturnOf((FnKind::DefineField(field), vec![arg0_ty, arg1_ty]))
}
GetField => {
let field = match instr.imm {
ImmOperand::Atom(atom) => atom,
_ => unreachable!(),
};
let ty = val_types[instr.args[0]].clone();
get_field(&ty, field, cache)
}
// ──────────────────────────────── Function Calls ──────────────────────────────────
Call | Call0 | Call1 | Call2 | Call3 | TailCall => todo!(),
// ────────────────────────────────────── Returns ───────────────────────────────────
Return | ReturnAsync => val_types[instr.args[0]].clone(),
ReturnUndef => Type::Empty,
_ => unreachable!(),
_ => unreachable!("{instr:?}"),
};
if is_ret {
@@ -189,14 +216,18 @@ fn walk_fn(
}
}
}
}
Ok(InferResult {
cache.insert(
req,
InferResult {
val_types,
ret_type,
})
},
);
}
pub fn atom_to_str(a: &AtomRef, atoms: &[Atom]) -> String {
fn atom_to_str(a: &AtomRef, atoms: &[Atom]) -> String {
match a {
AtomRef::TaggedInt(n) => n.to_string(),
AtomRef::Predefined(i) => atom_names::PREDEFINED_ATOMS