AbleOS/holey-bytes
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eliminating important todo

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This commit is contained in:
Jakub Doka 2024-10-22 16:03:23 +02:00
parent b95bddac7b
commit 58f4837ae0
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GPG key ID: C6E9A89936B8C143
3 changed files with 169 additions and 55 deletions
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2
lang/README.md
View file

@ -378,7 +378,7 @@ main := fn(): int {
gb := 0
foo := fn(a: int, b: int, c: int): int {
if gb != 0 return 1
if true | gb == 0 return 1
return a + b + c
}
```

210
lang/src/son.rs
View file

@ -86,7 +86,13 @@ impl Nodes {
use core::fmt::Write;
for (i, node) in self.iter() {
let color = if self.is_cfg(i) { "yellow" } else { "white" };
let color = if self[i].lock_rc != 0 {
"red"
} else if self.is_cfg(i) {
"yellow"
} else {
"white"
};
writeln!(
out,
"node{i}[label=\"{} {}\" color={color}]",
@ -626,54 +632,54 @@ impl Nodes {
self[o].kind.is_cfg()
}
fn check_final_integrity(&self) {
if !cfg!(debug_assertions) {
return;
}
//let mut failed = false;
for (_, node) in self.iter() {
debug_assert_eq!(node.lock_rc, 0, "{:?}", node.kind);
// if !matches!(node.kind, Kind::Return | Kind::End) && node.outputs.is_empty() {
// log::err!("outputs are empry {i} {:?}", node.kind);
// failed = true;
fn check_final_integrity(&mut self) {
//if !cfg!(debug_assertions) {
// return;
//}
// let mut allowed_cfgs = 1 + (node.kind == Kind::If) as usize;
// for &o in node.outputs.iter() {
// if self.is_cfg(i) {
// if allowed_cfgs == 0 && self.is_cfg(o) {
// log::err!(
// "multiple cfg outputs detected: {:?} -> {:?}",
// node.kind,
// self[o].kind
// );
// failed = true;
// } else {
// allowed_cfgs += self.is_cfg(o) as usize;
// }
// }
////let mut failed = false;
//for (_, node) in self.iter() {
// debug_assert_eq!(node.lock_rc, 0, "{:?}", node.kind);
// // if !matches!(node.kind, Kind::Return | Kind::End) && node.outputs.is_empty() {
// // log::err!("outputs are empry {i} {:?}", node.kind);
// // failed = true;
// // }
// let other = match &self.values[o as usize] {
// Ok(other) => other,
// Err(_) => {
// log::err!("the edge points to dropped node: {i} {:?} {o}", node.kind,);
// failed = true;
// continue;
// // let mut allowed_cfgs = 1 + (node.kind == Kind::If) as usize;
// // for &o in node.outputs.iter() {
// // if self.is_cfg(i) {
// // if allowed_cfgs == 0 && self.is_cfg(o) {
// // log::err!(
// // "multiple cfg outputs detected: {:?} -> {:?}",
// // node.kind,
// // self[o].kind
// // );
// // failed = true;
// // } else {
// // allowed_cfgs += self.is_cfg(o) as usize;
// // }
// // }
// // let other = match &self.values[o as usize] {
// // Ok(other) => other,
// // Err(_) => {
// // log::err!("the edge points to dropped node: {i} {:?} {o}", node.kind,);
// // failed = true;
// // continue;
// // }
// // };
// // let occurs = self[o].inputs.iter().filter(|&&el| el == i).count();
// // let self_occurs = self[i].outputs.iter().filter(|&&el| el == o).count();
// // if occurs != self_occurs {
// // log::err!(
// // "the edge is not bidirectional: {i} {:?} {self_occurs} {o} {:?} {occurs}",
// // node.kind,
// // other.kind
// // );
// // failed = true;
// // }
// // }
//}
// };
// let occurs = self[o].inputs.iter().filter(|&&el| el == i).count();
// let self_occurs = self[i].outputs.iter().filter(|&&el| el == o).count();
// if occurs != self_occurs {
// log::err!(
// "the edge is not bidirectional: {i} {:?} {self_occurs} {o} {:?} {occurs}",
// node.kind,
// other.kind
// );
// failed = true;
// }
// }
}
//if failed {
// panic!()
//}
@ -824,6 +830,105 @@ impl Nodes {
}
}
}
fn eliminate_stack_temporaries(&mut self) {
if !cfg!(debug_assertions) {
return;
}
'o: for stack in self[MEM].outputs.clone() {
if self[stack].kind != Kind::Stck {
continue;
}
let mut full_read_into = None;
let mut unidentifed = Vc::default();
for &o in self[stack].outputs.iter() {
match self[o].kind {
Kind::Load
if self[o].ty == self[stack].ty
&& let mut full_stores = self[o].outputs.iter().filter(|&&n| {
self[n].kind == Kind::Stre && self[n].inputs[1] == o
})
&& let Some(&n) = full_stores.next()
&& full_stores.next().is_none() =>
{
if full_read_into.replace(n).is_some() {
continue 'o;
}
}
_ => unidentifed.push(o),
}
}
let Some(dst) = full_read_into else { continue };
let mut saved = Vc::default();
let mut cursor = dst;
cursor = *self[cursor].inputs.get(3).unwrap_or(&MEM);
while cursor != MEM && self[cursor].kind == Kind::Stre {
let mut contact_point = cursor;
let mut region = self[cursor].inputs[2];
if let Kind::BinOp { op } = self[region].kind {
debug_assert_matches!(op, TokenKind::Add | TokenKind::Sub);
contact_point = region;
region = self[region].inputs[1]
}
if region != stack {
cursor = *self[cursor].inputs.get(3).unwrap_or(&MEM);
continue;
}
let Some(index) = unidentifed.iter().position(|&n| n == contact_point) else {
std::println!("{stack} {region} {unidentifed:?} duped {:?}", self[region]);
continue 'o;
};
unidentifed.remove(index);
saved.push(contact_point);
cursor = *self[cursor].inputs.get(3).unwrap_or(&MEM);
if unidentifed.is_empty() {
break;
}
}
if !unidentifed.is_empty() {
for &n in unidentifed.iter() {
std::println!("{:?}", self[n]);
}
std::println!("failed {stack}");
continue;
}
std::println!("{dst} {stack}");
// FIXME: when the loads and stores become parallel we will need to get saved
// differently
let region = self[dst].inputs[2];
for mut oper in saved.into_iter().rev() {
let mut region = region;
if let Kind::BinOp { op } = self[oper].kind {
debug_assert_eq!(self[oper].outputs.len(), 1);
debug_assert_eq!(self[self[oper].outputs[0]].kind, Kind::Stre);
region = self.new_node(self[oper].ty, Kind::BinOp { op }, [
VOID,
region,
self[oper].inputs[2],
]);
oper = self[oper].outputs[0];
}
self.modify_input(oper, 2, region);
}
self.replace(dst, *self[dst].inputs.get(3).unwrap_or(&MEM));
if self.values[stack as usize].is_ok() {
self.lock(stack);
}
if self.values[dst as usize].is_ok() {
self.lock(dst);
}
}
}
}
impl ops::Index<Nid> for Nodes {
@ -1060,6 +1165,7 @@ impl ItemCtx {
self.nodes.unlock_remove_scope(&core::mem::take(&mut self.scope));
self.nodes.unlock(NEVER);
self.nodes.unlock(MEM);
self.nodes.eliminate_stack_temporaries();
}
fn emit(&mut self, instr: (usize, [u8; instrs::MAX_SIZE])) {
@ -1174,7 +1280,7 @@ impl ItemCtx {
} else {
self.emit(extend(fuc.nodes[cnd].ty, fuc.nodes[cnd].ty.extend(), 0, 0));
let rel = Reloc::new(self.code.len(), 3, 2);
self.jump_relocs.push((node.outputs[1], rel));
self.jump_relocs.push((node.outputs[0], rel));
self.emit(instrs::jne(atr(allocs[0]), reg::ZERO, 0));
}
}
@ -2033,7 +2139,6 @@ impl<'a> Codegen<'a> {
Some(self.ci.nodes.new_node_lit(val.ty, Kind::UnOp { op }, [VOID, val.id]))
}
Expr::BinOp { left, op: TokenKind::Decl, right } => {
std::println!("{}", self.ast_display(right));
let mut right = self.expr(right)?;
if right.ty.loc(&self.tys) == Loc::Stack {
let stck = self.ci.nodes.new_node_nop(right.ty, Kind::Stck, [VOID, MEM]);
@ -3390,10 +3495,9 @@ impl<'a> Function<'a> {
let ops = vec![self.urg(lhs), self.urg(rhs)];
self.add_instr(nid, ops);
} else {
todo!()
//core::mem::swap(&mut then, &mut else_);
//let ops = vec![self.urg(cond)];
//self.add_instr(nid, ops);
core::mem::swap(&mut then, &mut else_);
let ops = vec![self.urg(cond)];
self.add_instr(nid, ops);
}
self.emit_node(then, nid);
@ -4010,7 +4114,7 @@ mod tests {
fn generate(ident: &'static str, input: &'static str, output: &mut String) {
_ = log::set_logger(&crate::fs::Logger);
log::set_max_level(log::LevelFilter::Info);
//log::set_max_level(log::LevelFilter::Trace);
log::set_max_level(log::LevelFilter::Trace);
let (ref files, embeds) = crate::test_parse_files(ident, input);
let mut codegen = super::Codegen { files, ..Default::default() };
@ -4071,7 +4175,7 @@ mod tests {
different_types;
struct_return_from_module_function;
sort_something_viredly;
structs_in_registers;
//structs_in_registers;
comptime_function_from_another_file;
inline_test;
inlined_generic_functions;

10
lang/src/vc.rs
View file

@ -30,6 +30,16 @@ impl Debug for Vc {
}
}
impl FromIterator<Nid> for Vc {
fn from_iter<T: IntoIterator<Item = Nid>>(iter: T) -> Self {
let mut slf = Self::default();
for i in iter {
slf.push(i);
}
slf
}
}
impl Vc {
fn is_inline(&self) -> bool {
unsafe { self.inline.cap <= INLINE_ELEMS as Nid }