InfernoDeity/holey-bytes
1
0
Fork 0
forked from AbleOS/holey-bytes
Code Issues Pull requests Packages Projects Releases Wiki Activity
holey-bytes/hblang/src/son.rs

3098 lines
102 KiB
Rust
Raw Blame History

#![allow(dead_code)]
use {
crate::{
ident::{self, Ident},
instrs,
lexer::{self, TokenKind},
log,
parser::{
self,
idfl::{self},
Expr, ExprRef, FileId, Pos,
},
task, ty, Field, Func, Reloc, Sig, Struct, SymKey, TypedReloc, Types,
},
core::fmt,
std::{
cell::RefCell,
collections::hash_map,
fmt::{Debug, Display, Write},
hash::{Hash as _, Hasher},
mem::{self, MaybeUninit},
ops::{self, Deref, DerefMut, Not},
ptr::Unique,
},
};
macro_rules! node_color {
($self:expr, $value:expr) => {
$self.ci.colors[$self.ci.nodes[$value].color as usize - 1]
};
}
macro_rules! node_loc {
($self:expr, $value:expr) => {
$self.ci.colors[$self.ci.nodes[$value].color as usize - 1].loc
};
}
struct Drom(&'static str);
impl Drop for Drom {
fn drop(&mut self) {
log::inf!("{}", self.0);
}
}
const VC_SIZE: usize = 16;
const INLINE_ELEMS: usize = VC_SIZE / std::mem::size_of::<Nid>() - 1;
union Vc {
inline: InlineVc,
alloced: AllocedVc,
}
impl Default for Vc {
fn default() -> Self {
Vc { inline: InlineVc { elems: MaybeUninit::uninit(), cap: 0 } }
}
}
impl Debug for Vc {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
self.as_slice().fmt(f)
}
}
impl Vc {
fn is_inline(&self) -> bool {
unsafe { self.inline.cap <= INLINE_ELEMS as Nid }
}
fn layout(&self) -> Option<std::alloc::Layout> {
unsafe {
self.is_inline()
.not()
.then(|| std::alloc::Layout::array::<Nid>(self.alloced.cap as _).unwrap_unchecked())
}
}
fn len(&self) -> usize {
unsafe {
if self.is_inline() {
self.inline.cap as _
} else {
self.alloced.len as _
}
}
}
fn len_mut(&mut self) -> &mut Nid {
unsafe {
if self.is_inline() {
&mut self.inline.cap
} else {
&mut self.alloced.len
}
}
}
fn as_ptr(&self) -> *const Nid {
unsafe {
match self.is_inline() {
true => self.inline.elems.as_ptr().cast(),
false => self.alloced.base.as_ptr(),
}
}
}
fn as_mut_ptr(&mut self) -> *mut Nid {
unsafe {
match self.is_inline() {
true => self.inline.elems.as_mut_ptr().cast(),
false => self.alloced.base.as_ptr(),
}
}
}
fn as_slice(&self) -> &[Nid] {
unsafe { std::slice::from_raw_parts(self.as_ptr(), self.len()) }
}
fn as_slice_mut(&mut self) -> &mut [Nid] {
unsafe { std::slice::from_raw_parts_mut(self.as_mut_ptr(), self.len()) }
}
fn push(&mut self, value: Nid) {
if let Some(layout) = self.layout()
&& unsafe { self.alloced.len == self.alloced.cap }
{
unsafe {
self.alloced.cap *= 2;
self.alloced.base = Unique::new_unchecked(
std::alloc::realloc(
self.alloced.base.as_ptr().cast(),
layout,
self.alloced.cap as usize * std::mem::size_of::<Nid>(),
)
.cast(),
);
}
} else if self.len() == INLINE_ELEMS {
unsafe {
let mut allcd =
Self::alloc((self.inline.cap + 1).next_power_of_two() as _, self.len());
std::ptr::copy_nonoverlapping(self.as_ptr(), allcd.as_mut_ptr(), self.len());
*self = allcd;
}
}
unsafe {
*self.len_mut() += 1;
self.as_mut_ptr().add(self.len() - 1).write(value);
}
}
unsafe fn alloc(cap: usize, len: usize) -> Self {
debug_assert!(cap > INLINE_ELEMS);
let layout = unsafe { std::alloc::Layout::array::<Nid>(cap).unwrap_unchecked() };
let alloc = unsafe { std::alloc::alloc(layout) };
unsafe {
Vc {
alloced: AllocedVc {
base: Unique::new_unchecked(alloc.cast()),
len: len as _,
cap: cap as _,
},
}
}
}
fn swap_remove(&mut self, index: usize) {
let len = self.len() - 1;
self.as_slice_mut().swap(index, len);
*self.len_mut() -= 1;
}
fn remove(&mut self, index: usize) {
self.as_slice_mut().copy_within(index + 1.., index);
*self.len_mut() -= 1;
}
}
impl Drop for Vc {
fn drop(&mut self) {
if let Some(layout) = self.layout() {
unsafe {
std::alloc::dealloc(self.alloced.base.as_ptr().cast(), layout);
}
}
}
}
impl Clone for Vc {
fn clone(&self) -> Self {
self.as_slice().into()
}
}
impl IntoIterator for Vc {
type IntoIter = VcIntoIter;
type Item = Nid;
fn into_iter(self) -> Self::IntoIter {
VcIntoIter { start: 0, end: self.len(), vc: self }
}
}
struct VcIntoIter {
start: usize,
end: usize,
vc: Vc,
}
impl Iterator for VcIntoIter {
type Item = Nid;
fn next(&mut self) -> Option<Self::Item> {
if self.start == self.end {
return None;
}
let ret = unsafe { std::ptr::read(self.vc.as_slice().get_unchecked(self.start)) };
self.start += 1;
Some(ret)
}
fn size_hint(&self) -> (usize, Option<usize>) {
let len = self.end - self.start;
(len, Some(len))
}
}
impl DoubleEndedIterator for VcIntoIter {
fn next_back(&mut self) -> Option<Self::Item> {
if self.start == self.end {
return None;
}
self.end -= 1;
Some(unsafe { std::ptr::read(self.vc.as_slice().get_unchecked(self.end)) })
}
}
impl ExactSizeIterator for VcIntoIter {}
impl<const SIZE: usize> From<[Nid; SIZE]> for Vc {
fn from(value: [Nid; SIZE]) -> Self {
value.as_slice().into()
}
}
impl<'a> From<&'a [Nid]> for Vc {
fn from(value: &'a [Nid]) -> Self {
if value.len() <= INLINE_ELEMS {
let mut dflt = Self::default();
unsafe {
std::ptr::copy_nonoverlapping(value.as_ptr(), dflt.as_mut_ptr(), value.len())
};
dflt.inline.cap = value.len() as _;
dflt
} else {
let mut allcd = unsafe { Self::alloc(value.len(), value.len()) };
unsafe {
std::ptr::copy_nonoverlapping(value.as_ptr(), allcd.as_mut_ptr(), value.len())
};
allcd
}
}
}
impl Deref for Vc {
type Target = [Nid];
fn deref(&self) -> &Self::Target {
self.as_slice()
}
}
impl DerefMut for Vc {
fn deref_mut(&mut self) -> &mut Self::Target {
self.as_slice_mut()
}
}
#[derive(Clone, Copy)]
#[repr(C)]
struct InlineVc {
cap: Nid,
elems: MaybeUninit<[Nid; INLINE_ELEMS]>,
}
#[derive(Clone, Copy)]
#[repr(C)]
struct AllocedVc {
cap: Nid,
len: Nid,
base: Unique<Nid>,
}
#[derive(Default)]
struct BitSet {
data: Vec<usize>,
}
impl BitSet {
const ELEM_SIZE: usize = std::mem::size_of::<usize>() * 8;
pub fn clear(&mut self, bit_size: usize) {
let new_len = (bit_size + Self::ELEM_SIZE - 1) / Self::ELEM_SIZE;
self.data.clear();
self.data.resize(new_len, 0);
}
#[track_caller]
pub fn set(&mut self, idx: Nid) -> bool {
let idx = idx as usize;
let data_idx = idx / Self::ELEM_SIZE;
let sub_idx = idx % Self::ELEM_SIZE;
let prev = self.data[data_idx] & (1 << sub_idx);
self.data[data_idx] |= 1 << sub_idx;
prev == 0
}
fn unset(&mut self, idx: Nid) {
let idx = idx as usize;
let data_idx = idx / Self::ELEM_SIZE;
let sub_idx = idx % Self::ELEM_SIZE;
self.data[data_idx] &= !(1 << sub_idx);
}
}
type Nid = u16;
pub mod reg {
pub const STACK_PTR: Reg = 254;
pub const ZERO: Reg = 0;
pub const RET: Reg = 1;
pub const RET_ADDR: Reg = 31;
pub type Reg = u8;
#[derive(Default)]
struct AllocMeta {
rc: u16,
depth: u16,
#[cfg(debug_assertions)]
allocated_at: Option<std::backtrace::Backtrace>,
}
struct Metas([AllocMeta; 256]);
impl Default for Metas {
fn default() -> Self {
Metas(std::array::from_fn(|_| AllocMeta::default()))
}
}
#[derive(Default)]
pub struct Alloc {
meta: Metas,
free: Vec<Reg>,
max_used: Reg,
}
impl Alloc {
pub fn init(&mut self) {
self.free.clear();
self.free.extend((32..=253).rev());
self.max_used = RET_ADDR;
}
pub fn allocate(&mut self, depth: u16) -> Reg {
let reg = self.free.pop().expect("TODO: we need to spill");
self.max_used = self.max_used.max(reg);
self.meta.0[reg as usize] = AllocMeta {
depth,
rc: 1,
#[cfg(debug_assertions)]
allocated_at: Some(std::backtrace::Backtrace::capture()),
};
reg
}
pub fn dup(&mut self, reg: Reg) {
self.meta.0[reg as usize].rc += 1;
}
pub fn free(&mut self, reg: Reg) {
if self.meta.0[reg as usize].rc == 1 {
self.free.push(reg);
self.meta.0[reg as usize] = Default::default();
} else {
self.meta.0[reg as usize].rc -= 1;
}
}
pub fn pushed_size(&self) -> usize {
((self.max_used as usize).saturating_sub(RET_ADDR as usize) + 1) * 8
}
pub fn mark_leaked(&mut self, reg: u8) {
self.meta.0[reg as usize].rc = u16::MAX;
}
}
}
struct LookupEntry {
nid: Nid,
hash: u64,
}
#[derive(Default)]
struct IdentityHash(u64);
impl std::hash::Hasher for IdentityHash {
fn finish(&self) -> u64 {
self.0
}
fn write(&mut self, _: &[u8]) {
unimplemented!()
}
fn write_u64(&mut self, i: u64) {
self.0 = i;
}
}
impl std::hash::Hash for LookupEntry {
fn hash<H: Hasher>(&self, state: &mut H) {
state.write_u64(self.hash);
}
}
type Lookup = std::collections::hash_map::HashMap<
LookupEntry,
(),
std::hash::BuildHasherDefault<IdentityHash>,
>;
struct Nodes {
values: Vec<Result<Node, Nid>>,
visited: BitSet,
free: Nid,
lookup: Lookup,
}
impl Default for Nodes {
fn default() -> Self {
Self {
values: Default::default(),
free: Nid::MAX,
lookup: Default::default(),
visited: Default::default(),
}
}
}
impl Nodes {
fn remove_low(&mut self, id: Nid) -> Node {
let value = mem::replace(&mut self.values[id as usize], Err(self.free)).unwrap();
self.free = id;
value
}
fn clear(&mut self) {
self.values.clear();
self.lookup.clear();
self.free = Nid::MAX;
}
fn new_node_nop(&mut self, ty: impl Into<ty::Id>, kind: Kind, inps: impl Into<Vc>) -> Nid {
let ty = ty.into();
let node = Node { inputs: inps.into(), kind, ty, ..Default::default() };
let mut lookup_meta = None;
if !node.is_lazy_phi() {
let (raw_entry, hash) = Self::find_node(&mut self.lookup, &self.values, &node);
let entry = match raw_entry {
hash_map::RawEntryMut::Occupied(mut o) => return o.get_key_value().0.nid,
hash_map::RawEntryMut::Vacant(v) => v,
};
lookup_meta = Some((entry, hash));
}
if self.free == Nid::MAX {
self.free = self.values.len() as _;
self.values.push(Err(Nid::MAX));
}
let free = self.free;
for &d in node.inputs.as_slice() {
debug_assert_ne!(d, free);
self.values[d as usize].as_mut().unwrap().outputs.push(free);
}
self.free = mem::replace(&mut self.values[free as usize], Ok(node)).unwrap_err();
if let Some((entry, hash)) = lookup_meta {
entry.insert(LookupEntry { nid: free, hash }, ());
}
free
}
fn find_node<'a>(
lookup: &'a mut Lookup,
values: &[Result<Node, Nid>],
node: &Node,
) -> (
hash_map::RawEntryMut<'a, LookupEntry, (), std::hash::BuildHasherDefault<IdentityHash>>,
u64,
) {
let mut hasher = crate::FnvHasher::default();
node.key().hash(&mut hasher);
let hash = hasher.finish();
let entry = lookup
.raw_entry_mut()
.from_hash(hash, |n| values[n.nid as usize].as_ref().unwrap().key() == node.key());
(entry, hash)
}
fn remove_node_lookup(&mut self, target: Nid) {
if !self[target].is_lazy_phi() {
match Self::find_node(
&mut self.lookup,
&self.values,
self.values[target as usize].as_ref().unwrap(),
)
.0
{
hash_map::RawEntryMut::Occupied(o) => o.remove(),
hash_map::RawEntryMut::Vacant(_) => unreachable!(),
};
}
}
fn new_node(&mut self, ty: impl Into<ty::Id>, kind: Kind, inps: impl Into<Vc>) -> Nid {
let id = self.new_node_nop(ty, kind, inps);
if let Some(opt) = self.peephole(id) {
debug_assert_ne!(opt, id);
self.lock(opt);
self.remove(id);
self.unlock(opt);
opt
} else {
id
}
}
fn lock(&mut self, target: Nid) {
self[target].lock_rc += 1;
}
#[track_caller]
fn unlock(&mut self, target: Nid) {
self[target].lock_rc -= 1;
}
fn remove(&mut self, target: Nid) -> bool {
if !self[target].is_dangling() {
return false;
}
for i in 0..self[target].inputs.len() {
let inp = self[target].inputs[i];
let index = self[inp].outputs.iter().position(|&p| p == target).unwrap();
self[inp].outputs.swap_remove(index);
self.remove(inp);
}
self.remove_node_lookup(target);
self.remove_low(target);
true
}
fn peephole(&mut self, target: Nid) -> Option<Nid> {
match self[target].kind {
Kind::Start => {}
Kind::End => {}
Kind::BinOp { op } => return self.peephole_binop(target, op),
Kind::Return => {}
Kind::Tuple { .. } => {}
Kind::CInt { .. } => {}
Kind::Call { .. } => {}
Kind::If => return self.peephole_if(target),
Kind::Region => {}
Kind::Phi => return self.peephole_phi(target),
Kind::Loop => {}
}
None
}
fn peephole_phi(&mut self, target: Nid) -> Option<Nid> {
if self[target].inputs[1] == self[target].inputs[2] {
return Some(self[target].inputs[1]);
}
None
}
fn peephole_if(&mut self, target: Nid) -> Option<Nid> {
let cond = self[target].inputs[1];
if let Kind::CInt { value } = self[cond].kind {
let ty = if value == 0 { ty::LEFT_UNREACHABLE } else { ty::RIGHT_UNREACHABLE };
return Some(self.new_node_nop(ty, Kind::If, [self[target].inputs[0], cond]));
}
None
}
fn peephole_binop(&mut self, target: Nid, op: TokenKind) -> Option<Nid> {
use {Kind as K, TokenKind as T};
let &[ctrl, mut lhs, mut rhs] = self[target].inputs.as_slice() else { unreachable!() };
let ty = self[target].ty;
if let (&K::CInt { value: a }, &K::CInt { value: b }) = (&self[lhs].kind, &self[rhs].kind) {
return Some(self.new_node(ty, K::CInt { value: op.apply(a, b) }, [ctrl]));
}
if lhs == rhs {
match op {
T::Sub => return Some(self.new_node(ty, K::CInt { value: 0 }, [ctrl])),
T::Add => {
let rhs = self.new_node_nop(ty, K::CInt { value: 2 }, [ctrl]);
return Some(self.new_node(ty, K::BinOp { op: T::Mul }, [ctrl, lhs, rhs]));
}
_ => {}
}
}
// this is more general the pushing constants to left to help deduplicate expressions more
let mut changed = false;
if op.is_comutative() && self[lhs].key() < self[rhs].key() {
std::mem::swap(&mut lhs, &mut rhs);
changed = true;
}
if let K::CInt { value } = self[rhs].kind {
match (op, value) {
(T::Add | T::Sub | T::Shl, 0) | (T::Mul | T::Div, 1) => return Some(lhs),
(T::Mul, 0) => return Some(rhs),
_ => {}
}
}
if op.is_comutative() && self[lhs].kind == (K::BinOp { op }) {
let &[_, a, b] = self[lhs].inputs.as_slice() else { unreachable!() };
if let K::CInt { value: av } = self[b].kind
&& let K::CInt { value: bv } = self[rhs].kind
{
// (a op #b) op #c => a op (#b op #c)
let new_rhs = self.new_node_nop(ty, K::CInt { value: op.apply(av, bv) }, [ctrl]);
return Some(self.new_node(ty, K::BinOp { op }, [ctrl, a, new_rhs]));
}
if self.is_const(b) {
// (a op #b) op c => (a op c) op #b
let new_lhs = self.new_node(ty, K::BinOp { op }, [ctrl, a, rhs]);
return Some(self.new_node(ty, K::BinOp { op }, [ctrl, new_lhs, b]));
}
}
if op == T::Add
&& self[lhs].kind == (K::BinOp { op: T::Mul })
&& self[lhs].inputs[1] == rhs
&& let K::CInt { value } = self[self[lhs].inputs[2]].kind
{
// a * #n + a => a * (#n + 1)
let new_rhs = self.new_node_nop(ty, K::CInt { value: value + 1 }, [ctrl]);
return Some(self.new_node(ty, K::BinOp { op: T::Mul }, [ctrl, rhs, new_rhs]));
}
if op == T::Sub && self[lhs].kind == (K::BinOp { op }) {
// (a - b) - c => a - (b + c)
let &[_, a, b] = self[lhs].inputs.as_slice() else { unreachable!() };
let c = rhs;
let new_rhs = self.new_node(ty, K::BinOp { op: T::Add }, [ctrl, b, c]);
return Some(self.new_node(ty, K::BinOp { op }, [ctrl, a, new_rhs]));
}
changed.then(|| self.new_node(ty, self[target].kind, [ctrl, lhs, rhs]))
}
fn is_const(&self, id: Nid) -> bool {
matches!(self[id].kind, Kind::CInt { .. })
}
fn replace(&mut self, target: Nid, with: Nid) {
let mut back_press = 0;
for i in 0..self[target].outputs.len() {
let out = self[target].outputs[i - back_press];
let index = self[out].inputs.iter().position(|&p| p == target).unwrap();
let prev_len = self[target].outputs.len();
self.modify_input(out, index, with);
back_press += (self[target].outputs.len() != prev_len) as usize;
}
self.remove(target);
}
fn modify_input(&mut self, target: Nid, inp_index: usize, with: Nid) -> Nid {
self.remove_node_lookup(target);
debug_assert_ne!(self[target].inputs[inp_index], with);
let prev = self[target].inputs[inp_index];
self[target].inputs[inp_index] = with;
let (entry, hash) = Self::find_node(
&mut self.lookup,
&self.values,
self.values[target as usize].as_ref().unwrap(),
);
match entry {
hash_map::RawEntryMut::Occupied(mut other) => {
let rpl = other.get_key_value().0.nid;
self[target].inputs[inp_index] = prev;
self.replace(target, rpl);
rpl
}
hash_map::RawEntryMut::Vacant(slot) => {
slot.insert(LookupEntry { nid: target, hash }, ());
let index = self[prev].outputs.iter().position(|&o| o == target).unwrap();
self[prev].outputs.swap_remove(index);
self[with].outputs.push(target);
target
}
}
}
#[track_caller]
fn unlock_remove(&mut self, id: Nid) -> bool {
self[id].lock_rc -= 1;
self.remove(id)
}
fn iter(&self) -> impl DoubleEndedIterator<Item = (Nid, &Node)> {
self.values.iter().enumerate().filter_map(|(i, s)| Some((i as _, s.as_ref().ok()?)))
}
fn fmt(&self, f: &mut fmt::Formatter, node: Nid, rcs: &mut [usize]) -> fmt::Result {
let mut is_ready = || {
if rcs[node as usize] == 0 {
return false;
}
rcs[node as usize] = rcs[node as usize].saturating_sub(1);
rcs[node as usize] == 0
};
match self[node].kind {
Kind::BinOp { op } => {
write!(f, "(")?;
self.fmt(f, self[node].inputs[0], rcs)?;
write!(f, " {op} ")?;
self.fmt(f, self[node].inputs[1], rcs)?;
write!(f, ")")?;
}
Kind::Return => {
write!(f, "{}: return [{:?}] ", node, self[node].inputs[0])?;
if self[node].inputs[1] != 0 {
self.fmt(f, self[node].inputs[1], rcs)?;
}
writeln!(f)?;
self.fmt(f, self[node].inputs[1], rcs)?;
}
Kind::CInt { value } => write!(f, "{}", value)?,
Kind::End => {
if is_ready() {
writeln!(f, "{}: {:?}", node, self[node].kind)?;
}
}
Kind::Tuple { index } => {
if index != 0 && self[self[node].inputs[0]].kind == Kind::Start {
write!(f, "{:?}.{}", self[self[node].inputs[0]].kind, index)?;
} else if is_ready() {
writeln!(f, "{}: {:?}", node, self[node].kind)?;
for &o in self[node].outputs.iter() {
if self.is_cfg(o) {
self.fmt(f, o, rcs)?;
}
}
}
}
Kind::Start => 'b: {
if !is_ready() {
break 'b;
}
writeln!(f, "{}: {:?}", node, self[node].kind)?;
for &o in self[node].outputs.iter() {
self.fmt(f, o, rcs)?;
}
}
Kind::Call { func } => {
if is_ready() {
write!(f, "{}: call {}(", node, func)?;
for (i, &value) in self[node].inputs.iter().skip(1).enumerate() {
if i != 0 {
write!(f, ", ")?;
}
self.fmt(f, value, rcs)?;
}
writeln!(f, ")")?;
for &o in self[node].outputs.iter() {
if self.is_cfg(o) {
self.fmt(f, o, rcs)?;
}
}
} else {
write!(f, "call{node}")?;
}
}
Kind::If => todo!(),
Kind::Region => todo!(),
Kind::Phi => todo!(),
Kind::Loop => todo!(),
}
Ok(())
}
fn graphviz_low(&self, out: &mut String) -> std::fmt::Result {
use std::fmt::Write;
for (i, node) in self.iter() {
let color = if self.is_cfg(i) { "yellow" } else { "white" };
writeln!(out, "node{i}[label=\"{}\" color={color}]", node.kind)?;
for (j, &o) in node.outputs.iter().enumerate() {
let color = if self.is_cfg(i) && self.is_cfg(o) { "red" } else { "lightgray" };
let index = self[o].inputs.iter().position(|&inp| i == inp).unwrap();
let style = if index == 0 && !self.is_cfg(o) { "style=dotted" } else { "" };
writeln!(
out,
"node{o} -> node{i}[color={color} taillabel={index} headlabel={j} {style}]",
)?;
}
}
Ok(())
}
#[allow(clippy::format_in_format_args)]
fn basic_blocks_instr(&mut self, out: &mut String, node: Nid) -> std::fmt::Result {
if self[node].kind != Kind::Loop && self[node].kind != Kind::Region {
write!(out, " {node:>2}: ")?;
}
match self[node].kind {
Kind::Start => unreachable!(),
Kind::End => unreachable!(),
Kind::If => write!(out, " if: "),
Kind::Region | Kind::Loop => writeln!(out, " goto: {node}"),
Kind::Return => write!(out, " ret: "),
Kind::CInt { value } => write!(out, "cint: #{value:<4}"),
Kind::Phi => write!(out, " phi: "),
Kind::Tuple { index } => write!(out, " arg: {index:<5}"),
Kind::BinOp { op } => {
write!(out, "{:>4}: ", op.name())
}
Kind::Call { func } => {
write!(out, "call: {func} {} ", self[node].depth)
}
}?;
if self[node].kind != Kind::Loop && self[node].kind != Kind::Region {
writeln!(
out,
" {:<14} {}",
format!("{:?}", self[node].inputs),
format!("{:?}", self[node].outputs)
)?;
}
Ok(())
}
fn basic_blocks_low(&mut self, out: &mut String, mut node: Nid) -> std::fmt::Result {
let iter = |nodes: &Nodes, node| nodes[node].outputs.clone().into_iter().rev();
while self.visited.set(node) {
match self[node].kind {
Kind::Start => {
writeln!(out, "start: {}", self[node].depth)?;
let mut cfg_index = Nid::MAX;
for o in iter(self, node) {
self.basic_blocks_instr(out, o)?;
if self[o].kind == (Kind::Tuple { index: 0 }) {
cfg_index = o;
}
}
node = cfg_index;
}
Kind::End => break,
Kind::If => {
self.basic_blocks_low(out, self[node].outputs[0])?;
node = self[node].outputs[1];
}
Kind::Region => {
writeln!(out, "region{node}: {}", self[node].depth)?;
let mut cfg_index = Nid::MAX;
for o in iter(self, node) {
self.basic_blocks_instr(out, o)?;
if self.is_cfg(o) {
cfg_index = o;
}
}
node = cfg_index;
}
Kind::Loop => {
writeln!(out, "loop{node}: {}", self[node].depth)?;
let mut cfg_index = Nid::MAX;
for o in iter(self, node) {
self.basic_blocks_instr(out, o)?;
if self.is_cfg(o) {
cfg_index = o;
}
}
node = cfg_index;
}
Kind::Return => {
node = self[node].outputs[0];
}
Kind::CInt { .. } => unreachable!(),
Kind::Phi => unreachable!(),
Kind::Tuple { .. } => {
writeln!(out, "b{node}: {} {:?}", self[node].depth, self[node].outputs)?;
let mut cfg_index = Nid::MAX;
for o in iter(self, node) {
self.basic_blocks_instr(out, o)?;
if self.is_cfg(o) {
cfg_index = o;
}
}
node = cfg_index;
}
Kind::BinOp { .. } => unreachable!(),
Kind::Call { .. } => {
let mut cfg_index = Nid::MAX;
let mut print_ret = true;
for o in iter(self, node) {
if self[o].inputs[0] == node
&& (self[node].outputs[0] != o || std::mem::take(&mut print_ret))
{
self.basic_blocks_instr(out, o)?;
}
if self.is_cfg(o) {
cfg_index = o;
}
}
node = cfg_index;
}
}
}
Ok(())
}
fn basic_blocks(&mut self) {
let mut out = String::new();
self.visited.clear(self.values.len());
self.basic_blocks_low(&mut out, 0).unwrap();
eprintln!("{out}");
}
fn graphviz(&self) {
let out = &mut String::new();
_ = self.graphviz_low(out);
log::inf!("{out}");
}
fn is_cfg(&self, o: Nid) -> bool {
self[o].kind.is_cfg()
}
fn check_final_integrity(&self) {
let mut failed = false;
for (i, 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 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;
}
}
}
if failed {
panic!()
}
}
fn climb_expr(&mut self, from: Nid, mut for_each: impl FnMut(Nid, &Node) -> bool) -> bool {
fn climb_impl(
nodes: &mut Nodes,
from: Nid,
for_each: &mut impl FnMut(Nid, &Node) -> bool,
) -> bool {
for i in 0..nodes[from].inputs.len() {
let n = nodes[from].inputs[i];
if n != Nid::MAX
&& nodes.visited.set(n)
&& !nodes.is_cfg(n)
&& (for_each(n, &nodes[n]) || climb_impl(nodes, n, for_each))
{
return true;
}
}
false
}
self.visited.clear(self.values.len());
climb_impl(self, from, &mut for_each)
}
fn late_peephole(&mut self, target: Nid) -> Nid {
if let Some(id) = self.peephole(target) {
self.replace(target, id);
return id;
}
target
}
fn load_loop_value(&mut self, index: usize, value: &mut Nid, loops: &mut [Loop]) {
if *value != 0 {
return;
}
let [loob, loops @ ..] = loops else { unreachable!() };
let lvalue = &mut loob.scope[index].value;
self.load_loop_value(index, lvalue, loops);
if !self[*lvalue].is_lazy_phi() {
self.unlock(*value);
let inps = [loob.node, *lvalue, 0];
self.unlock(inps[1]);
let ty = self[inps[1]].ty;
let phi = self.new_node_nop(ty, Kind::Phi, inps);
self[phi].lock_rc += 2;
*value = phi;
*lvalue = phi;
} else {
self.unlock_remove(*value);
*value = *lvalue;
self.lock(*value);
}
}
}
impl ops::Index<Nid> for Nodes {
type Output = Node;
fn index(&self, index: Nid) -> &Self::Output {
self.values[index as usize].as_ref().unwrap()
}
}
impl ops::IndexMut<Nid> for Nodes {
fn index_mut(&mut self, index: Nid) -> &mut Self::Output {
self.values[index as usize].as_mut().unwrap()
}
}
#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord, Default)]
#[repr(u8)]
pub enum Kind {
#[default]
Start,
End,
If,
Region,
Loop,
Return,
CInt {
value: i64,
},
Phi,
Tuple {
index: u32,
},
BinOp {
op: lexer::TokenKind,
},
Call {
func: ty::Func,
},
}
impl Kind {
fn is_pinned(&self) -> bool {
self.is_cfg() || matches!(self, Kind::Phi)
}
fn is_cfg(&self) -> bool {
matches!(
self,
Kind::Start
| Kind::End
| Kind::Return
| Kind::Tuple { .. }
| Kind::Call { .. }
| Kind::If
| Kind::Region
| Kind::Loop
)
}
fn ends_basic_block(&self) -> bool {
matches!(self, Kind::Return | Kind::If | Kind::End)
}
fn starts_basic_block(&self) -> bool {
matches!(self, Kind::Start | Kind::End | Kind::Tuple { .. } | Kind::Region | Kind::Loop)
}
}
impl fmt::Display for Kind {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
Kind::CInt { value } => write!(f, "#{value}"),
Kind::Tuple { index } => write!(f, "tupl[{index}]"),
Kind::BinOp { op } => write!(f, "{op}"),
Kind::Call { func, .. } => write!(f, "call {func}"),
slf => write!(f, "{slf:?}"),
}
}
}
#[derive(Debug, Default)]
//#[repr(align(64))]
struct Node {
inputs: Vc,
outputs: Vc,
kind: Kind,
color: Color,
depth: IDomDepth,
lock_rc: LockRc,
ty: ty::Id,
loop_depth: LoopDepth,
}
impl Node {
fn is_dangling(&self) -> bool {
self.outputs.len() + self.lock_rc as usize == 0
}
fn key(&self) -> (Kind, &[Nid], ty::Id) {
(self.kind, &self.inputs, self.ty)
}
fn is_lazy_phi(&self) -> bool {
self.kind == Kind::Phi && self.inputs[2] == 0
}
}
impl fmt::Display for Nodes {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
self.fmt(
f,
0,
&mut self
.values
.iter()
.map(|s| match s {
Ok(Node { kind: Kind::Start, .. }) => 1,
Ok(Node { kind: Kind::End, ref outputs, .. }) => outputs.len(),
Ok(val) => val.inputs.len(),
Err(_) => 0,
})
.collect::<Vec<_>>(),
)
}
}
type Offset = u32;
type Size = u32;
type Color = u16;
type LoopDepth = u16;
type CallCount = u16;
type LockRc = u16;
type IDomDepth = u16;
struct Loop {
node: Nid,
ctrl: [Nid; 2],
ctrl_scope: [Vec<Variable>; 2],
scope: Vec<Variable>,
}
#[derive(Clone, Copy)]
struct Variable {
id: Ident,
value: Nid,
}
struct ColorMeta {
rc: u32,
depth: LoopDepth,
call_count: CallCount,
loc: Loc,
}
#[derive(Default)]
struct ItemCtx {
file: FileId,
id: ty::Id,
ret: Option<ty::Id>,
task_base: usize,
nodes: Nodes,
start: Nid,
end: Nid,
ctrl: Nid,
loop_depth: LoopDepth,
colors: Vec<ColorMeta>,
call_count: u16,
filled: Vec<Nid>,
delayed_frees: Vec<Color>,
loops: Vec<Loop>,
vars: Vec<Variable>,
regs: reg::Alloc,
ret_relocs: Vec<Reloc>,
relocs: Vec<TypedReloc>,
code: Vec<u8>,
}
impl ItemCtx {
fn next_color(&mut self) -> Color {
self.colors.push(ColorMeta {
rc: 0,
call_count: self.call_count,
depth: self.loop_depth,
loc: Default::default(),
});
self.colors.len() as _ // leave out 0 (sentinel)
}
fn set_next_color(&mut self, node: Nid) {
let color = self.next_color();
self.set_color(node, color);
}
fn set_color(&mut self, node: Nid, color: Color) {
if self.nodes[node].color != 0 {
debug_assert_ne!(self.nodes[node].color, color);
self.colors[self.nodes[node].color as usize - 1].rc -= 1;
}
self.nodes[node].color = color;
self.colors[color as usize - 1].rc += 1;
}
fn recolor(&mut self, node: Nid, from: Color, to: Color) {
if from == to {
return;
}
if self.nodes[node].color != from {
return;
}
self.set_color(node, to);
for i in 0..self.nodes[node].inputs.len() {
self.recolor(self.nodes[node].inputs[i], from, to);
}
}
fn check_color_integrity(&self) {
let node_count = self
.nodes
.values
.iter()
.filter(|v| {
matches!(
v,
Ok(Node {
kind: Kind::BinOp { .. }
| Kind::Call { .. }
| Kind::Phi
| Kind::CInt { .. },
..
})
) || matches!(
v,
Ok(Node { kind: Kind::Tuple { index: 1.. }, inputs, .. }) if inputs.first() == Some(&0)
)
})
.count();
let color_count = self.colors.iter().map(|c| c.rc).sum::<u32>();
debug_assert_eq!(node_count, color_count as usize);
}
fn emit(&mut self, instr: (usize, [u8; instrs::MAX_SIZE])) {
crate::emit(&mut self.code, instr);
}
fn free_loc(&mut self, loc: impl Into<Option<Loc>>) {
if let Some(loc) = loc.into() {
self.regs.free(loc.reg);
}
}
}
fn write_reloc(doce: &mut [u8], offset: usize, value: i64, size: u16) {
let value = value.to_ne_bytes();
doce[offset..offset + size as usize].copy_from_slice(&value[..size as usize]);
}
struct FTask {
file: FileId,
id: ty::Func,
}
#[derive(Default, Debug)]
struct Ctx {
ty: Option<ty::Id>,
}
impl Ctx {
pub fn with_ty(self, ty: impl Into<ty::Id>) -> Self {
Self { ty: Some(ty.into()) }
}
}
#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
struct Loc {
reg: reg::Reg,
}
#[derive(Default, Debug, Clone, Copy)]
struct GenCtx {
loc: Option<Loc>,
}
impl GenCtx {
pub fn with_loc(self, loc: impl Into<Loc>) -> Self {
Self { loc: Some(loc.into()) }
}
}
#[derive(Default)]
struct Pool {
cis: Vec<ItemCtx>,
}
#[derive(Default)]
pub struct Codegen {
pub files: Vec<parser::Ast>,
tasks: Vec<Option<FTask>>,
tys: Types,
ci: ItemCtx,
pool: Pool,
errors: RefCell<String>,
}
impl Codegen {
pub fn generate(&mut self) {
self.find_or_declare(0, 0, None, "main");
self.make_func_reachable(0);
self.complete_call_graph_low();
}
fn make_func_reachable(&mut self, func: ty::Func) {
let fuc = &mut self.tys.funcs[func as usize];
if fuc.offset == u32::MAX {
fuc.offset = task::id(self.tasks.len() as _);
self.tasks.push(Some(FTask { file: fuc.file, id: func }));
}
}
fn expr(&mut self, expr: &Expr) -> Option<Nid> {
self.expr_ctx(expr, Ctx::default())
}
fn build_struct(&mut self, fields: &[(&str, Expr)]) -> ty::Struct {
let fields = fields
.iter()
.map(|&(name, ty)| Field { name: name.into(), ty: self.ty(&ty) })
.collect();
self.tys.structs.push(Struct { fields });
self.tys.structs.len() as u32 - 1
}
fn expr_ctx(&mut self, expr: &Expr, ctx: Ctx) -> Option<Nid> {
let msg = "i know nothing about this name gal which is vired \
because we parsed succesfully";
match *expr {
Expr::Comment { .. } => Some(0),
Expr::Ident { pos, id, .. } => {
let Some(index) = self.ci.vars.iter().position(|v| v.id == id) else {
self.report(pos, msg);
return Some(self.ci.end);
};
self.ci.nodes.load_loop_value(
index,
&mut self.ci.vars[index].value,
&mut self.ci.loops,
);
Some(self.ci.vars[index].value)
}
Expr::BinOp { left: &Expr::Ident { id, .. }, op: TokenKind::Decl, right } => {
let value = self.expr(right)?;
self.ci.nodes.lock(value);
self.ci.vars.push(Variable { id, value });
Some(0)
}
Expr::BinOp { left: &Expr::Ident { id, pos, .. }, op: TokenKind::Assign, right } => {
let value = self.expr(right)?;
self.ci.nodes.lock(value);
let Some(var) = self.ci.vars.iter_mut().find(|v| v.id == id) else {
self.report(pos, msg);
return Some(self.ci.end);
};
let prev = std::mem::replace(&mut var.value, value);
self.ci.nodes.unlock_remove(prev);
Some(0)
}
Expr::BinOp { left, op, right } => {
let lhs = self.expr_ctx(left, ctx)?;
self.ci.nodes.lock(lhs);
let rhs = self.expr_ctx(right, Ctx::default().with_ty(self.tof(lhs)));
self.ci.nodes.unlock(lhs);
let rhs = rhs?;
let ty = self.assert_ty(
left.pos(),
self.tof(rhs),
self.tof(lhs),
false,
"right operand",
);
let inps = [0, lhs, rhs];
Some(self.ci.nodes.new_node(ty::bin_ret(ty, op), Kind::BinOp { op }, inps))
}
Expr::If { cond, then, else_, .. } => {
let cond = self.expr_ctx(cond, Ctx::default().with_ty(ty::BOOL))?;
let if_node = self.ci.nodes.new_node(ty::VOID, Kind::If, [self.ci.ctrl, cond]);
'b: {
let branch = match self.tof(if_node).expand().inner() {
ty::LEFT_UNREACHABLE => else_,
ty::RIGHT_UNREACHABLE => Some(then),
_ => break 'b,
};
self.ci.nodes.lock(self.ci.ctrl);
self.ci.nodes.remove(if_node);
self.ci.nodes.unlock(self.ci.ctrl);
if let Some(branch) = branch {
return self.expr(branch);
} else {
return Some(0);
}
}
let mut else_scope = self.ci.vars.clone();
for &el in &self.ci.vars {
self.ci.nodes.lock(el.value);
}
self.ci.ctrl =
self.ci.nodes.new_node(ty::VOID, Kind::Tuple { index: 0 }, [if_node]);
let lcntrl = self.expr(then).map_or(Nid::MAX, |_| self.ci.ctrl);
let mut then_scope = std::mem::replace(&mut self.ci.vars, else_scope);
self.ci.ctrl =
self.ci.nodes.new_node(ty::VOID, Kind::Tuple { index: 1 }, [if_node]);
let rcntrl = if let Some(else_) = else_ {
self.expr(else_).map_or(Nid::MAX, |_| self.ci.ctrl)
} else {
self.ci.ctrl
};
if lcntrl == Nid::MAX && rcntrl == Nid::MAX {
for then_var in then_scope {
self.ci.nodes.unlock_remove(then_var.value);
}
return None;
} else if lcntrl == Nid::MAX {
for then_var in then_scope {
self.ci.nodes.unlock_remove(then_var.value);
}
return Some(0);
} else if rcntrl == Nid::MAX {
for else_var in &self.ci.vars {
self.ci.nodes.unlock_remove(else_var.value);
}
self.ci.vars = then_scope;
self.ci.ctrl = lcntrl;
return Some(0);
}
self.ci.ctrl = self.ci.nodes.new_node(ty::VOID, Kind::Region, [lcntrl, rcntrl]);
else_scope = std::mem::take(&mut self.ci.vars);
for (i, (else_var, then_var)) in
else_scope.iter_mut().zip(&mut then_scope).enumerate()
{
if else_var.value == then_var.value {
self.ci.nodes.unlock_remove(then_var.value);
continue;
}
self.ci.nodes.load_loop_value(i, &mut then_var.value, &mut self.ci.loops);
self.ci.nodes.load_loop_value(i, &mut else_var.value, &mut self.ci.loops);
self.ci.nodes.unlock(then_var.value);
let ty = self.ci.nodes[else_var.value].ty;
debug_assert_eq!(
ty,
self.ci.nodes[then_var.value].ty,
"TODO: typecheck properly: {} != {}\n{}",
self.ty_display(ty),
self.ty_display(self.ci.nodes[then_var.value].ty),
self.errors.borrow()
);
let inps = [self.ci.ctrl, then_var.value, else_var.value];
self.ci.nodes.unlock(else_var.value);
else_var.value = self.ci.nodes.new_node(ty, Kind::Phi, inps);
self.ci.nodes.lock(else_var.value);
}
self.ci.vars = else_scope;
Some(0)
}
Expr::Loop { body, .. } => {
self.ci.ctrl = self.ci.nodes.new_node(ty::VOID, Kind::Loop, [self.ci.ctrl; 2]);
self.ci.loops.push(Loop {
node: self.ci.ctrl,
ctrl: [Nid::MAX; 2],
ctrl_scope: std::array::from_fn(|_| vec![]),
scope: self.ci.vars.clone(),
});
for var in &mut self.ci.vars {
var.value = 0;
}
self.ci.nodes[0].lock_rc += self.ci.vars.len() as LockRc;
self.expr(body);
if self.ci.loops.last_mut().unwrap().ctrl[0] != Nid::MAX {
self.jump_to(0, 0);
self.ci.ctrl = self.ci.loops.last_mut().unwrap().ctrl[0];
}
let Loop { node, ctrl: [.., bre], ctrl_scope: [.., mut bre_scope], scope } =
self.ci.loops.pop().unwrap();
self.ci.nodes.modify_input(node, 1, self.ci.ctrl);
let idx = self.ci.nodes[node]
.outputs
.iter()
.position(|&n| self.ci.nodes.is_cfg(n))
.unwrap();
self.ci.nodes[node].outputs.swap(idx, 0);
self.ci.ctrl = bre;
if bre == Nid::MAX {
return None;
}
self.ci.nodes.lock(self.ci.ctrl);
std::mem::swap(&mut self.ci.vars, &mut bre_scope);
for ((dest_var, mut scope_var), loop_var) in
self.ci.vars.iter_mut().zip(scope).zip(bre_scope)
{
self.ci.nodes.unlock(loop_var.value);
if loop_var.value != 0 {
self.ci.nodes.unlock(scope_var.value);
if loop_var.value != scope_var.value {
scope_var.value =
self.ci.nodes.modify_input(scope_var.value, 2, loop_var.value);
self.ci.nodes.lock(scope_var.value);
} else {
let phi = &self.ci.nodes[scope_var.value];
debug_assert_eq!(phi.kind, Kind::Phi);
debug_assert_eq!(phi.inputs[2], 0);
let prev = phi.inputs[1];
self.ci.nodes.replace(scope_var.value, prev);
scope_var.value = prev;
self.ci.nodes.lock(prev);
}
}
if dest_var.value == 0 {
self.ci.nodes.unlock_remove(dest_var.value);
dest_var.value = scope_var.value;
self.ci.nodes.lock(dest_var.value);
}
self.ci.nodes.unlock_remove(scope_var.value);
}
self.ci.nodes.unlock(self.ci.ctrl);
Some(0)
}
Expr::Break { pos } => self.jump_to(pos, 1),
Expr::Continue { pos } => self.jump_to(pos, 0),
Expr::Call { func: &Expr::Ident { pos, id, name, .. }, args, .. } => {
self.ci.call_count += 1;
let func = self.find_or_declare(pos, self.ci.file, Some(id), name);
let ty::Kind::Func(func) = func else {
self.report(
pos,
format_args!(
"compiler cant (yet) call '{}'",
self.ty_display(func.compress())
),
);
return Some(self.ci.end);
};
self.make_func_reachable(func);
let fuc = &self.tys.funcs[func as usize];
let sig = fuc.sig.expect("TODO: generic functions");
let ast = self.files[fuc.file as usize].clone();
let Expr::BinOp { right: &Expr::Closure { args: cargs, .. }, .. } =
fuc.expr.get(&ast).unwrap()
else {
unreachable!()
};
self.assert_report(
args.len() == cargs.len(),
pos,
format_args!(
"expected {} function argumenr{}, got {}",
cargs.len(),
if cargs.len() == 1 { "" } else { "s" },
args.len()
),
);
let mut inps = Vc::from([self.ci.ctrl]);
for ((arg, carg), tyx) in args.iter().zip(cargs).zip(sig.args.range()) {
let ty = self.tys.args[tyx];
if self.tys.size_of(ty) == 0 {
continue;
}
let value = self.expr_ctx(arg, Ctx::default().with_ty(ty))?;
_ = self.assert_ty(
arg.pos(),
self.tof(value),
ty,
true,
format_args!("argument {}", carg.name),
);
inps.push(value);
}
self.ci.ctrl = self.ci.nodes.new_node(sig.ret, Kind::Call { func }, inps);
Some(self.ci.ctrl)
}
Expr::Return { pos, val } => {
let value = if let Some(val) = val {
self.expr_ctx(val, Ctx { ty: self.ci.ret })?
} else {
0
};
let inps = [self.ci.ctrl, value];
let out = &mut String::new();
self.report_log_to(pos, "returning here", out);
self.ci.ctrl = self.ci.nodes.new_node(ty::VOID, Kind::Return, inps);
self.ci.nodes[self.ci.end].inputs.push(self.ci.ctrl);
self.ci.nodes[self.ci.ctrl].outputs.push(self.ci.end);
let expected = *self.ci.ret.get_or_insert(self.tof(value));
_ = self.assert_ty(pos, self.tof(value), expected, true, "return value");
None
}
Expr::Block { stmts, .. } => {
let base = self.ci.vars.len();
let mut ret = Some(0);
for stmt in stmts {
ret = ret.and(self.expr(stmt));
if let Some(id) = ret {
_ = self.assert_ty(
stmt.pos(),
self.tof(id),
ty::VOID.into(),
true,
"statement",
);
} else {
break;
}
}
self.ci.nodes.lock(self.ci.ctrl);
for var in self.ci.vars.drain(base..) {
self.ci.nodes.unlock_remove(var.value);
}
self.ci.nodes.unlock(self.ci.ctrl);
ret
}
Expr::Number { value, .. } => Some(self.ci.nodes.new_node(
ctx.ty.filter(|ty| ty.is_integer() || ty.is_pointer()).unwrap_or(ty::INT.into()),
Kind::CInt { value },
[0],
)),
ref e => {
self.report_unhandled_ast(e, "bruh");
Some(self.ci.end)
}
}
}
fn jump_to(&mut self, pos: Pos, id: usize) -> Option<Nid> {
let Some(loob) = self.ci.loops.last_mut() else {
self.report(pos, "break outside a loop");
return None;
};
if loob.ctrl[id] == Nid::MAX {
loob.ctrl[id] = self.ci.ctrl;
loob.ctrl_scope[id] = self.ci.vars[..loob.scope.len()].to_owned();
for v in &loob.ctrl_scope[id] {
self.ci.nodes.lock(v.value)
}
} else {
loob.ctrl[id] =
self.ci.nodes.new_node(ty::VOID, Kind::Region, [self.ci.ctrl, loob.ctrl[id]]);
for (else_var, then_var) in loob.ctrl_scope[id].iter_mut().zip(&self.ci.vars) {
if else_var.value == then_var.value {
continue;
}
let ty = self.ci.nodes[else_var.value].ty;
debug_assert_eq!(ty, self.ci.nodes[then_var.value].ty, "TODO: typecheck properly");
let inps = [loob.ctrl[id], then_var.value, else_var.value];
self.ci.nodes.unlock(else_var.value);
else_var.value = self.ci.nodes.new_node(ty, Kind::Phi, inps);
self.ci.nodes.lock(else_var.value);
}
}
self.ci.ctrl = self.ci.end;
None
}
#[inline(always)]
fn tof(&self, id: Nid) -> ty::Id {
self.ci.nodes[id].ty
}
fn complete_call_graph(&mut self) {
self.complete_call_graph_low();
}
fn complete_call_graph_low(&mut self) {
while self.ci.task_base < self.tasks.len()
&& let Some(task_slot) = self.tasks.pop()
{
let Some(task) = task_slot else { continue };
self.handle_task(task);
}
}
fn handle_task(&mut self, FTask { file, id }: FTask) {
let func = &mut self.tys.funcs[id as usize];
func.offset = u32::MAX - 1;
debug_assert!(func.file == file);
let sig = func.sig.unwrap();
let ast = self.files[file as usize].clone();
let expr = func.expr.get(&ast).unwrap();
let repl = ItemCtx {
file,
id: ty::Kind::Func(id).compress(),
ret: Some(sig.ret),
..self.pool.cis.pop().unwrap_or_default()
};
let prev_ci = std::mem::replace(&mut self.ci, repl);
self.ci.start = self.ci.nodes.new_node(ty::VOID, Kind::Start, []);
self.ci.end = self.ci.nodes.new_node(ty::NEVER, Kind::End, []);
self.ci.ctrl = self.ci.nodes.new_node(ty::VOID, Kind::Tuple { index: 0 }, [self.ci.start]);
let Expr::BinOp {
left: Expr::Ident { name, .. },
op: TokenKind::Decl,
right: &Expr::Closure { body, args, .. },
} = expr
else {
unreachable!("{expr}")
};
let mut sig_args = sig.args.range();
for (arg, index) in args.iter().zip(1u32..) {
let ty = self.tys.args[sig_args.next().unwrap()];
let value = self.ci.nodes.new_node(ty, Kind::Tuple { index }, [self.ci.start]);
self.ci.nodes.lock(value);
let sym = parser::find_symbol(&ast.symbols, arg.id);
assert!(sym.flags & idfl::COMPTIME == 0, "TODO");
self.ci.vars.push(Variable { id: arg.id, value });
}
let mut orig_vars = self.ci.vars.clone();
if self.expr(body).is_some() {
self.report(body.pos(), "expected all paths in the fucntion to return");
}
for (i, var) in self.ci.vars.drain(..).enumerate() {
let ty = self.ci.nodes[var.value].ty;
if self.ci.nodes.unlock_remove(var.value) {
// mark as unused
orig_vars[i].id = ty.repr();
orig_vars[i].value = Nid::MAX;
}
}
if self.errors.borrow().is_empty() {
self.gcm();
//self.ci.nodes.graphviz();
log::inf!("{id} {name}: ");
self.ci.nodes.basic_blocks();
#[cfg(debug_assertions)]
{
self.ci.nodes.check_final_integrity();
}
log::trc!("{}", self.ci.nodes);
'_open_function: {
self.ci.emit(instrs::addi64(reg::STACK_PTR, reg::STACK_PTR, 0));
self.ci.emit(instrs::st(reg::RET_ADDR, reg::STACK_PTR, 0, 0));
}
self.ci.regs.init();
let call_count = self.ci.call_count;
'_color_args: {
for var in &orig_vars {
if var.value != Nid::MAX {
self.ci.set_next_color(var.value);
}
}
}
self.color_control(self.ci.nodes[self.ci.start].outputs[0]);
#[cfg(debug_assertions)]
{
self.ci.check_color_integrity();
}
self.ci.vars = orig_vars;
self.ci.call_count = call_count;
self.emit_control(self.ci.nodes[self.ci.start].outputs[0]);
self.ci.vars.clear();
if let Some(last_ret) = self.ci.ret_relocs.last()
&& last_ret.offset as usize == self.ci.code.len() - 5
{
self.ci.code.truncate(self.ci.code.len() - 5);
self.ci.ret_relocs.pop();
}
let end = self.ci.code.len();
for ret_rel in self.ci.ret_relocs.drain(..) {
ret_rel.apply_jump(&mut self.ci.code, end as _, 0);
}
'_close_function: {
let pushed = self.ci.regs.pushed_size() as i64;
let stack = 0;
write_reloc(&mut self.ci.code, 3, -(pushed + stack), 8);
write_reloc(&mut self.ci.code, 3 + 8 + 3, stack, 8);
write_reloc(&mut self.ci.code, 3 + 8 + 3 + 8, pushed, 2);
self.ci.emit(instrs::ld(reg::RET_ADDR, reg::STACK_PTR, stack as _, pushed as _));
self.ci.emit(instrs::addi64(reg::STACK_PTR, reg::STACK_PTR, (pushed + stack) as _));
self.ci.emit(instrs::jala(reg::ZERO, reg::RET_ADDR, 0));
}
}
self.tys.funcs[id as usize].code.append(&mut self.ci.code);
self.tys.funcs[id as usize].relocs.append(&mut self.ci.relocs);
self.ci.nodes.clear();
self.ci.colors.clear();
self.ci.filled.clear();
self.pool.cis.push(std::mem::replace(&mut self.ci, prev_ci));
}
fn color_control(&mut self, mut ctrl: Nid) -> Option<Nid> {
for _ in 0..30 {
match self.ci.nodes[ctrl].kind {
Kind::Start => unreachable!(),
Kind::End => unreachable!(),
Kind::Return => {
let ret = self.ci.nodes[ctrl].inputs[1];
if ret != 0 {
_ = self.color_expr_consume(ret);
if node_color!(self, ret).call_count == self.ci.call_count {
node_loc!(self, ret) =
match self.tys.size_of(self.ci.ret.expect("TODO")) {
0 => Loc::default(),
1..=8 => Loc { reg: 1 },
s => todo!("{s}"),
};
}
self.ci.regs.mark_leaked(1);
}
return None;
}
Kind::CInt { .. } => unreachable!(),
Kind::Tuple { .. } => {
ctrl = self.ci.nodes[ctrl].outputs[0];
}
Kind::BinOp { .. } => unreachable!(),
Kind::Call { .. } => {
for i in 1..self.ci.nodes[ctrl].inputs.len() {
let arg = self.ci.nodes[ctrl].inputs[i];
_ = self.color_expr_consume(arg);
self.ci.set_next_color(arg);
}
self.ci.call_count -= 1;
self.ci.set_next_color(ctrl);
ctrl = *self.ci.nodes[ctrl]
.outputs
.iter()
.find(|&&o| self.ci.nodes.is_cfg(o))
.unwrap();
}
Kind::If => {
_ = self.color_expr_consume(self.ci.nodes[ctrl].inputs[1]);
let left_unreachable = self.color_control(self.ci.nodes[ctrl].outputs[0]);
let right_unreachable = self.color_control(self.ci.nodes[ctrl].outputs[1]);
let dest = match (left_unreachable, right_unreachable) {
(None, None) => return None,
(None, Some(n)) | (Some(n), None) => return Some(n),
(Some(l), Some(r)) if l == r => l,
(Some(left), Some(right)) => {
todo!("{:?} {:?}", self.ci.nodes[left], self.ci.nodes[right]);
}
};
if self.ci.nodes[dest].kind == Kind::Loop {
return Some(dest);
}
debug_assert_eq!(self.ci.nodes[dest].kind, Kind::Region);
for i in 0..self.ci.nodes[dest].outputs.len() {
let o = self.ci.nodes[dest].outputs[i];
if self.ci.nodes[o].kind == Kind::Phi {
self.color_phi(o);
self.ci.nodes[o].depth = self.ci.loop_depth;
}
}
ctrl = *self.ci.nodes[dest]
.outputs
.iter()
.find(|&&o| self.ci.nodes[o].kind != Kind::Phi)
.unwrap();
}
Kind::Region => return Some(ctrl),
Kind::Phi => todo!(),
Kind::Loop => {
if self.ci.nodes[ctrl].lock_rc != 0 {
return Some(ctrl);
}
for i in 0..self.ci.nodes[ctrl].outputs.len() {
let maybe_phi = self.ci.nodes[ctrl].outputs[i];
let Node { kind: Kind::Phi, ref inputs, .. } = self.ci.nodes[maybe_phi]
else {
continue;
};
_ = self.color_expr_consume(inputs[1]);
self.ci.nodes[maybe_phi].depth = self.ci.loop_depth;
self.ci.set_next_color(maybe_phi);
}
self.ci.nodes[ctrl].lock_rc = self.ci.code.len() as _;
self.ci.loop_depth += 1;
self.color_control(
*self.ci.nodes[ctrl]
.outputs
.iter()
.find(|&&o| self.ci.nodes[o].kind != Kind::Phi)
.unwrap(),
);
for i in 0..self.ci.nodes[ctrl].outputs.len() {
self.color_phi(self.ci.nodes[ctrl].outputs[i]);
}
self.ci.loop_depth -= 1;
self.ci.nodes[ctrl].lock_rc = 0;
return None;
}
}
}
unreachable!()
}
fn color_phi(&mut self, maybe_phi: Nid) {
let Node { kind: Kind::Phi, ref inputs, .. } = self.ci.nodes[maybe_phi] else {
return;
};
let &[region, left, right] = inputs.as_slice() else { unreachable!() };
let lcolor = self.color_expr_consume(left);
let rcolor = self.color_expr_consume(right);
if self.ci.nodes[maybe_phi].color != 0 {
// loop phi
if let Some(c) = rcolor
&& !self.ci.nodes.climb_expr(right, |i, n| {
matches!(n.kind, Kind::Phi) && n.inputs[0] == region && i != maybe_phi
})
{
self.ci.recolor(right, c, self.ci.nodes[maybe_phi].color);
}
} else {
let color = match (lcolor, rcolor) {
(None, None) => self.ci.next_color(),
(None, Some(c)) | (Some(c), None) => c,
(Some(lc), Some(rc)) => {
self.ci.recolor(right, rc, lc);
lc
}
};
self.ci.set_color(maybe_phi, color);
}
}
#[must_use = "dont forget to drop the location"]
fn color_expr_consume(&mut self, expr: Nid) -> Option<Color> {
if self.ci.nodes[expr].lock_rc == 0 && self.ci.nodes[expr].kind != Kind::Phi {
self.ci.nodes[expr].depth = self.ci.loop_depth;
self.color_expr(expr);
}
self.use_colored_expr(expr)
}
fn color_expr(&mut self, expr: Nid) {
match self.ci.nodes[expr].kind {
Kind::Start => unreachable!(),
Kind::End => unreachable!(),
Kind::Return => unreachable!(),
Kind::CInt { .. } => self.ci.set_next_color(expr),
Kind::Tuple { index } => {
debug_assert!(index != 0);
}
Kind::BinOp { .. } => {
let &[_, left, right] = self.ci.nodes[expr].inputs.as_slice() else {
unreachable!()
};
let lcolor = self.color_expr_consume(left);
let rcolor = self.color_expr_consume(right);
let color = lcolor.or(rcolor).unwrap_or_else(|| self.ci.next_color());
self.ci.set_color(expr, color);
}
Kind::Call { .. } => {}
Kind::If => todo!(),
Kind::Region => todo!(),
Kind::Phi => {}
Kind::Loop => todo!(),
}
}
#[must_use]
fn use_colored_expr(&mut self, expr: Nid) -> Option<Color> {
self.ci.nodes[expr].lock_rc += 1;
debug_assert_ne!(self.ci.nodes[expr].color, 0, "{:?}", self.ci.nodes[expr].kind);
(self.ci.nodes[expr].lock_rc as usize >= self.ci.nodes[expr].outputs.len()
&& self.ci.nodes[expr].depth == self.ci.loop_depth)
.then_some(self.ci.nodes[expr].color)
}
fn emit_control(&mut self, mut ctrl: Nid) -> Option<Nid> {
for _ in 0..30 {
match self.ci.nodes[ctrl].kind {
Kind::Start => unreachable!(),
Kind::End => unreachable!(),
Kind::Return => {
let ret = self.ci.nodes[ctrl].inputs[1];
if ret != 0 {
// NOTE: this is safer less efficient way, maybe it will be needed
// self.emit_expr_consume(ret);
// if node_color!(self, ret).call_count != self.ci.call_count {
// let src = node_loc!(self, ret);
// let loc = match self.tys.size_of(self.ci.ret.expect("TODO")) {
// 0 => Loc::default(),
// 1..=8 => Loc { reg: 1 },
// s => todo!("{s}"),
// };
// if src != loc {
// let inst = instrs::cp(loc.reg, src.reg);
// self.ci.emit(inst);
// }
// }
node_loc!(self, ret) = match self.tys.size_of(self.ci.ret.expect("TODO")) {
0 => Loc::default(),
1..=8 => Loc { reg: 1 },
s => todo!("{s}"),
};
self.emit_expr_consume(ret);
}
self.ci.ret_relocs.push(Reloc::new(self.ci.code.len(), 1, 4));
self.ci.emit(instrs::jmp(0));
return None;
}
Kind::CInt { .. } => unreachable!(),
Kind::Tuple { .. } => {
ctrl = self.ci.nodes[ctrl].outputs[0];
}
Kind::BinOp { .. } => unreachable!(),
Kind::Call { func } => {
let ret = self.tof(ctrl);
let mut parama = self.tys.parama(ret);
for i in 1..self.ci.nodes[ctrl].inputs.len() {
let arg = self.ci.nodes[ctrl].inputs[i];
let dst = match self.tys.size_of(self.tof(arg)) {
0 => continue,
1..=8 => Loc { reg: parama.next() },
s => todo!("{s}"),
};
self.emit_expr_consume(arg);
self.ci.emit(instrs::cp(dst.reg, node_loc!(self, arg).reg));
}
let reloc = Reloc::new(self.ci.code.len(), 3, 4);
self.ci
.relocs
.push(TypedReloc { target: ty::Kind::Func(func).compress(), reloc });
self.ci.emit(instrs::jal(reg::RET_ADDR, reg::ZERO, 0));
self.ci.call_count -= 1;
'b: {
let ret_loc = match self.tys.size_of(ret) {
0 => break 'b,
1..=8 => Loc { reg: 1 },
s => todo!("{s}"),
};
if self.ci.nodes[ctrl].outputs.len() == 1 {
break 'b;
}
if self.ci.call_count == 0 {
node_loc!(self, ctrl) = ret_loc;
} else {
self.emit_pass_low(ret_loc, ctrl);
}
}
ctrl = *self.ci.nodes[ctrl]
.outputs
.iter()
.find(|&&o| self.ci.nodes.is_cfg(o))
.unwrap();
}
Kind::If => {
let cond = self.ci.nodes[ctrl].inputs[1];
let jump_offset: i64;
let mut swapped = false;
'resolve_cond: {
'optimize_cond: {
let Kind::BinOp { op } = self.ci.nodes[cond].kind else {
break 'optimize_cond;
};
let &[_, left, right] = self.ci.nodes[cond].inputs.as_slice() else {
unreachable!()
};
let Some((op, swpd)) =
Self::cond_op(op, self.ci.nodes[left].ty.is_signed())
else {
break 'optimize_cond;
};
swapped = swpd;
self.emit_expr_consume(left);
self.emit_expr_consume(right);
jump_offset = self.ci.code.len() as _;
self.ci.emit(op(
node_loc!(self, left).reg,
node_loc!(self, right).reg,
0,
));
break 'resolve_cond;
}
self.emit_expr_consume(cond);
jump_offset = self.ci.code.len() as _;
self.ci.emit(instrs::jeq(node_loc!(self, cond).reg, reg::ZERO, 0));
}
let [loff, roff] = [swapped as usize, !swapped as usize];
let filled_base = self.ci.filled.len();
let left_unreachable = self.emit_control(self.ci.nodes[ctrl].outputs[loff]);
for fld in self.ci.filled.drain(filled_base..) {
self.ci.nodes[fld].depth = 0;
}
let mut skip_then_offset = self.ci.code.len() as i64;
if let Some(region) = left_unreachable {
for i in 0..self.ci.nodes[region].outputs.len() {
let o = self.ci.nodes[region].outputs[i];
if self.ci.nodes[o].kind != Kind::Phi {
continue;
}
let out = self.ci.nodes[o].inputs[1 + loff];
self.emit_expr_consume(out);
self.emit_pass(out, o);
}
skip_then_offset = self.ci.code.len() as i64;
self.ci.emit(instrs::jmp(0));
}
let right_base = self.ci.code.len();
let filled_base = self.ci.filled.len();
let right_unreachable = self.emit_control(self.ci.nodes[ctrl].outputs[roff]);
for fld in self.ci.filled.drain(filled_base..) {
self.ci.nodes[fld].depth = 0;
}
if let Some(region) = left_unreachable {
for i in 0..self.ci.nodes[region].outputs.len() {
let o = self.ci.nodes[region].outputs[i];
if self.ci.nodes[o].kind != Kind::Phi {
continue;
}
let out = self.ci.nodes[o].inputs[1 + roff];
self.emit_expr_consume(out);
self.emit_pass(out, o);
}
let right_end = self.ci.code.len();
if right_base == right_end {
self.ci.code.truncate(skip_then_offset as _);
} else {
write_reloc(
&mut self.ci.code,
skip_then_offset as usize + 1,
right_end as i64 - skip_then_offset,
4,
);
skip_then_offset += instrs::jmp(69).0 as i64;
}
}
write_reloc(
&mut self.ci.code,
jump_offset as usize + 3,
skip_then_offset - jump_offset,
2,
);
let dest = left_unreachable.or(right_unreachable)?;
if self.ci.nodes[dest].kind == Kind::Loop {
return Some(dest);
}
debug_assert_eq!(self.ci.nodes[dest].kind, Kind::Region);
ctrl = *self.ci.nodes[dest]
.outputs
.iter()
.find(|&&o| self.ci.nodes[o].kind != Kind::Phi)
.unwrap();
}
Kind::Region => return Some(ctrl),
Kind::Phi => todo!(),
Kind::Loop => {
if self.ci.nodes[ctrl].lock_rc != 0 {
return Some(ctrl);
}
for i in 0..self.ci.nodes[ctrl].outputs.len() {
let o = self.ci.nodes[ctrl].outputs[i];
if self.ci.nodes[o].kind != Kind::Phi {
continue;
}
let out = self.ci.nodes[o].inputs[1];
self.emit_expr_consume(out);
self.emit_pass(out, o);
}
self.ci.nodes[ctrl].lock_rc = self.ci.code.len() as _;
self.ci.loop_depth += 1;
let end = self.emit_control(
*self.ci.nodes[ctrl]
.outputs
.iter()
.find(|&&o| self.ci.nodes[o].kind != Kind::Phi)
.unwrap(),
);
debug_assert_eq!(end, Some(ctrl));
for i in 0..self.ci.nodes[ctrl].outputs.len() {
let o = self.ci.nodes[ctrl].outputs[i];
if self.ci.nodes[o].kind != Kind::Phi {
continue;
}
let out = self.ci.nodes[o].inputs[2];
// TODO: this can be improved if we juggle ownership of the Phi inputs
self.emit_expr(out);
}
for i in 0..self.ci.nodes[ctrl].outputs.len() {
let o = self.ci.nodes[ctrl].outputs[i];
if self.ci.nodes[o].kind != Kind::Phi {
continue;
}
let out = self.ci.nodes[o].inputs[2];
self.use_expr(out);
self.emit_pass(out, o);
}
self.ci.emit(instrs::jmp(
self.ci.nodes[ctrl].lock_rc as i32 - self.ci.code.len() as i32,
));
self.ci.loop_depth -= 1;
for free in self.ci.delayed_frees.extract_if(|&mut color| {
self.ci.colors[color as usize].depth == self.ci.loop_depth
}) {
let color = &self.ci.colors[free as usize];
debug_assert_ne!(color.loc, Loc::default());
self.ci.regs.free(color.loc.reg);
}
return None;
}
}
}
unreachable!()
}
fn emit_expr_consume(&mut self, expr: Nid) {
self.emit_expr(expr);
self.use_expr(expr);
}
fn emit_expr(&mut self, expr: Nid) {
if self.ci.nodes[expr].depth == IDomDepth::MAX {
return;
}
self.ci.nodes[expr].depth = IDomDepth::MAX;
self.ci.filled.push(expr);
match self.ci.nodes[expr].kind {
Kind::Start => unreachable!(),
Kind::End => unreachable!(),
Kind::Return => unreachable!(),
Kind::CInt { value } => {
_ = self.lazy_init(expr);
let instr = instrs::li64(node_loc!(self, expr).reg, value as _);
self.ci.emit(instr);
}
Kind::Tuple { index } => {
debug_assert!(index != 0);
_ = self.lazy_init(expr);
let mut params = self.tys.parama(self.ci.ret.unwrap());
for (i, var) in self.ci.vars.iter().enumerate() {
if var.value == Nid::MAX {
match self.tys.size_of(ty::Id::from_bt(var.id)) {
0 => {}
1..=8 => _ = params.next(),
s => todo!("{s}"),
}
continue;
}
match self.tys.size_of(self.ci.nodes[var.value].ty) {
0 => {}
1..=8 => {
let reg = params.next();
if i == index as usize - 1 {
crate::emit(
&mut self.ci.code,
instrs::cp(node_loc!(self, expr).reg, reg),
);
}
}
s => todo!("{s}"),
}
}
}
Kind::BinOp { op } => {
_ = self.lazy_init(expr);
let ty = self.tof(expr);
let &[_, left, right] = self.ci.nodes[expr].inputs.as_slice() else {
unreachable!()
};
self.emit_expr_consume(left);
if let Kind::CInt { value } = self.ci.nodes[right].kind
&& (node_loc!(self, right) == Loc::default()
|| self.ci.nodes[right].depth != IDomDepth::MAX)
&& let Some(op) = Self::imm_math_op(op, ty.is_signed(), self.tys.size_of(ty))
{
let instr =
op(node_loc!(self, expr).reg, node_loc!(self, left).reg, value as _);
self.ci.emit(instr);
} else {
self.emit_expr_consume(right);
let op = Self::math_op(op, ty.is_signed(), self.tys.size_of(ty))
.expect("TODO: what now?");
let instr = op(
node_loc!(self, expr).reg,
node_loc!(self, left).reg,
node_loc!(self, right).reg,
);
self.ci.emit(instr);
}
}
Kind::Call { .. } => {}
Kind::If => todo!(),
Kind::Region => todo!(),
Kind::Phi => {}
Kind::Loop => todo!(),
}
}
fn use_expr(&mut self, expr: Nid) {
let node = &mut self.ci.nodes[expr];
node.lock_rc = node.lock_rc.saturating_sub(1);
if node.lock_rc != 0 {
return;
}
let color = &mut self.ci.colors[node.color as usize - 1];
color.rc -= 1;
if color.rc == 0 {
if color.depth != self.ci.loop_depth {
self.ci.delayed_frees.push(node.color);
} else if color.loc != Loc::default() {
self.ci.regs.free(color.loc.reg);
}
}
}
#[allow(clippy::type_complexity)]
fn imm_math_op(
op: TokenKind,
signed: bool,
size: u32,
) -> Option<fn(u8, u8, u64) -> (usize, [u8; instrs::MAX_SIZE])> {
use {instrs::*, TokenKind as T};
macro_rules! def_op {
($name:ident |$a:ident, $b:ident, $c:ident| $($tt:tt)*) => {
macro_rules! $name {
($$($$op:ident),*) => {
[$$(
|$a, $b, $c: u64| $$op($($tt)*),
)*]
}
}
};
}
def_op!(basic_op | a, b, c | a, b, c as _);
def_op!(sub_op | a, b, c | a, b, c.wrapping_neg() as _);
let ops = match op {
T::Add => basic_op!(addi8, addi16, addi32, addi64),
T::Sub => sub_op!(addi8, addi16, addi32, addi64),
T::Mul => basic_op!(muli8, muli16, muli32, muli64),
T::Band => return Some(andi),
T::Bor => return Some(ori),
T::Xor => return Some(xori),
T::Shr if signed => basic_op!(srui8, srui16, srui32, srui64),
T::Shr => basic_op!(srui8, srui16, srui32, srui64),
T::Shl => basic_op!(slui8, slui16, slui32, slui64),
_ => return None,
};
Some(ops[size.ilog2() as usize])
}
#[allow(clippy::type_complexity)]
fn cond_op(
op: TokenKind,
signed: bool,
) -> Option<(fn(u8, u8, i16) -> (usize, [u8; instrs::MAX_SIZE]), bool)> {
Some((
match op {
TokenKind::Le if signed => instrs::jgts,
TokenKind::Le => instrs::jgtu,
TokenKind::Lt if signed => instrs::jlts,
TokenKind::Lt => instrs::jltu,
TokenKind::Eq => instrs::jne,
TokenKind::Ne => instrs::jeq,
_ => return None,
},
matches!(op, TokenKind::Lt | TokenKind::Gt),
))
}
#[allow(clippy::type_complexity)]
fn math_op(
op: TokenKind,
signed: bool,
size: u32,
) -> Option<fn(u8, u8, u8) -> (usize, [u8; instrs::MAX_SIZE])> {
use {instrs::*, TokenKind as T};
macro_rules! div { ($($op:ident),*) => {[$(|a, b, c| $op(a, reg::ZERO, b, c)),*]}; }
macro_rules! rem { ($($op:ident),*) => {[$(|a, b, c| $op(reg::ZERO, a, b, c)),*]}; }
let ops = match op {
T::Add => [add8, add16, add32, add64],
T::Sub => [sub8, sub16, sub32, sub64],
T::Mul => [mul8, mul16, mul32, mul64],
T::Div if signed => div!(dirs8, dirs16, dirs32, dirs64),
T::Div => div!(diru8, diru16, diru32, diru64),
T::Mod if signed => rem!(dirs8, dirs16, dirs32, dirs64),
T::Mod => rem!(diru8, diru16, diru32, diru64),
T::Band => return Some(and),
T::Bor => return Some(or),
T::Xor => return Some(xor),
T::Shl => [slu8, slu16, slu32, slu64],
T::Shr if signed => [srs8, srs16, srs32, srs64],
T::Shr => [sru8, sru16, sru32, sru64],
_ => return None,
};
Some(ops[size.ilog2() as usize])
}
// TODO: sometimes its better to do this in bulk
fn ty(&mut self, expr: &Expr) -> ty::Id {
match *expr {
Expr::Ident { id, .. } if ident::is_null(id) => id.into(),
ref e => {
self.report_unhandled_ast(e, "type");
ty::NEVER.into()
}
}
}
fn find_or_declare(
&mut self,
pos: Pos,
file: FileId,
name: Option<Ident>,
lit_name: &str,
) -> ty::Kind {
log::trc!("find_or_declare: {lit_name} {file}");
let f = self.files[file as usize].clone();
let Some((expr, ident)) = f.find_decl(name.ok_or(lit_name)) else {
match name.ok_or(lit_name) {
Ok(name) => {
let name = self.cfile().ident_str(name);
self.report(pos, format_args!("idk indentifier: {name}"))
}
Err("main") => self.report(
pos,
format_args!(
"missing main function in '{}', compiler can't \
emmit libraries since such concept is not defined",
f.path
),
),
Err(name) => self.report(pos, format_args!("idk indentifier: {name}")),
}
return ty::Kind::Builtin(ty::NEVER);
};
if let Some(existing) = self.tys.syms.get(&SymKey { file, ident }) {
if let ty::Kind::Func(id) = existing.expand()
&& let func = &mut self.tys.funcs[id as usize]
&& let Err(idx) = task::unpack(func.offset)
&& idx < self.tasks.len()
{
func.offset = task::id(self.tasks.len());
let task = self.tasks[idx].take();
self.tasks.push(task);
}
return existing.expand();
}
let prev_file = std::mem::replace(&mut self.ci.file, file);
let sym = match expr {
Expr::BinOp {
left: &Expr::Ident { .. },
op: TokenKind::Decl,
right: &Expr::Closure { pos, args, ret, .. },
} => {
let func = Func {
file,
sig: '_b: {
let arg_base = self.tys.args.len();
for arg in args {
let sym = parser::find_symbol(&f.symbols, arg.id);
assert!(sym.flags & idfl::COMPTIME == 0, "TODO");
let ty = self.ty(&arg.ty);
self.tys.args.push(ty);
}
let Some(args) = self.pack_args(arg_base) else {
self.fatal_report(
pos,
"you cant be serious, using more the 31 arguments in a function",
);
};
let ret = self.ty(ret);
Some(Sig { args, ret })
},
expr: {
let refr = ExprRef::new(expr);
debug_assert!(refr.get(&f).is_some());
refr
},
..Default::default()
};
let id = self.tys.funcs.len() as _;
self.tys.funcs.push(func);
ty::Kind::Func(id)
}
Expr::BinOp {
left: &Expr::Ident { .. },
op: TokenKind::Decl,
right: Expr::Struct { fields, .. },
} => ty::Kind::Struct(self.build_struct(fields)),
Expr::BinOp { .. } => {
todo!()
}
e => unimplemented!("{e:#?}"),
};
self.ci.file = prev_file;
self.tys.syms.insert(SymKey { ident, file }, sym.compress());
sym
}
fn ty_display(&self, ty: ty::Id) -> ty::Display {
ty::Display::new(&self.tys, &self.files, ty)
}
#[must_use]
#[track_caller]
fn assert_ty(
&self,
pos: Pos,
ty: ty::Id,
expected: ty::Id,
preserve_expected: bool,
hint: impl fmt::Display,
) -> ty::Id {
if let Some(res) = ty.try_upcast(expected)
&& (!preserve_expected || res == expected)
{
res
} else {
let ty = self.ty_display(ty);
let expected = self.ty_display(expected);
self.report(pos, format_args!("expected {hint} to be of type {expected}, got {ty}"));
ty::NEVER.into()
}
}
fn report_log(&self, pos: Pos, msg: impl std::fmt::Display) {
let mut buf = self.errors.borrow_mut();
self.report_log_to(pos, msg, &mut *buf);
}
fn report_log_to(&self, pos: Pos, msg: impl std::fmt::Display, out: &mut impl std::fmt::Write) {
self.cfile().report_to(pos, msg, out);
}
#[track_caller]
fn assert_report(&self, cond: bool, pos: Pos, msg: impl std::fmt::Display) {
if !cond {
self.report(pos, msg);
}
}
#[track_caller]
fn report(&self, pos: Pos, msg: impl std::fmt::Display) {
self.report_log(pos, msg);
}
#[track_caller]
fn report_unhandled_ast(&self, ast: &Expr, hint: &str) {
self.report(
ast.pos(),
format_args!(
"compiler does not (yet) know how to handle ({hint}):\n\
{ast:}\n\
info for weak people:\n\
{ast:#?}"
),
);
}
fn cfile(&self) -> &parser::Ast {
&self.files[self.ci.file as usize]
}
fn pack_args(&mut self, arg_base: usize) -> Option<ty::Tuple> {
let needle = &self.tys.args[arg_base..];
if needle.is_empty() {
return Some(ty::Tuple::empty());
}
let len = needle.len();
// FIXME: maybe later when this becomes a bottleneck we use more
// efficient search (SIMD?, indexing?)
let sp = self.tys.args.windows(needle.len()).position(|val| val == needle).unwrap();
self.tys.args.truncate((sp + needle.len()).max(arg_base));
ty::Tuple::new(sp, len)
}
fn emit_pass(&mut self, src: Nid, dst: Nid) {
if self.ci.nodes[src].color == self.ci.nodes[dst].color {
return;
}
self.emit_pass_low(node_loc!(self, src), dst);
}
fn emit_pass_low(&mut self, src: Loc, dst: Nid) {
let loc = &mut node_loc!(self, dst);
if src != *loc {
if *loc == Loc::default() {
let reg = self.ci.regs.allocate(0);
*loc = Loc { reg };
}
let inst = instrs::cp(loc.reg, src.reg);
self.ci.emit(inst);
}
}
#[must_use]
fn lazy_init(&mut self, expr: Nid) -> bool {
let loc = &mut node_loc!(self, expr);
if *loc == Loc::default() {
let reg = self.ci.regs.allocate(0);
*loc = Loc { reg };
return true;
}
false
}
fn fatal_report(&self, pos: Pos, msg: impl Display) -> ! {
self.report(pos, msg);
eprintln!("{}", self.errors.borrow());
std::process::exit(1);
}
fn gcm(&mut self) {
fn loop_depth(target: Nid, nodes: &mut Nodes) -> LoopDepth {
if nodes[target].loop_depth != 0 {
return nodes[target].loop_depth;
}
nodes[target].loop_depth = match nodes[target].kind {
Kind::Tuple { .. } | Kind::Call { .. } | Kind::Return | Kind::If => {
loop_depth(nodes[target].inputs[0], nodes)
}
Kind::Region => loop_depth(idom(nodes, target), nodes),
Kind::Loop => {
let depth = loop_depth(nodes[target].inputs[0], nodes) + 1;
let mut cursor = nodes[target].inputs[1];
while cursor != target {
nodes[cursor].loop_depth = depth;
let next = idom(nodes, cursor);
if let Kind::Tuple { index } = nodes[cursor].kind
&& nodes[next].kind == Kind::If
{
let other = *nodes[next].outputs.iter().find(|&&n| matches!(nodes[n].kind, Kind::Tuple { index: oi } if index != oi)).unwrap();
nodes[other].loop_depth = depth - 1;
}
cursor = next;
}
depth
}
Kind::Start | Kind::End => 1,
Kind::CInt { .. } | Kind::Phi | Kind::BinOp { .. } => {
unreachable!()
}
};
nodes[target].loop_depth
}
fn better(nodes: &mut Nodes, is: Nid, then: Nid) -> bool {
loop_depth(is, nodes) < loop_depth(then, nodes)
|| idepth(nodes, is) > idepth(nodes, then)
|| nodes[then].kind == Kind::If
}
fn idepth(nodes: &mut Nodes, target: Nid) -> IDomDepth {
if target == 0 {
return 0;
}
if nodes[target].depth == 0 {
let dm = idom(nodes, target);
nodes[target].depth = idepth(nodes, dm) + 1;
}
nodes[target].depth
}
fn idom(nodes: &mut Nodes, target: Nid) -> Nid {
match nodes[target].kind {
Kind::Start => 0,
Kind::End => unreachable!(),
Kind::Loop
| Kind::CInt { .. }
| Kind::BinOp { .. }
| Kind::Call { .. }
| Kind::Phi
| Kind::Tuple { .. }
| Kind::Return
| Kind::If => nodes[target].inputs[0],
Kind::Region => {
let &[lcfg, rcfg] = nodes[target].inputs.as_slice() else { unreachable!() };
common_dom(lcfg, rcfg, nodes)
}
}
}
fn push_up(nodes: &mut Nodes, node: Nid) {
if !nodes.visited.set(node) {
return;
}
if nodes[node].kind.is_pinned() {
for i in 0..nodes[node].inputs.len() {
let i = nodes[node].inputs[i];
push_up(nodes, i);
}
} else {
let mut max = 0;
for i in 0..nodes[node].inputs.len() {
let i = nodes[node].inputs[i];
let is_call = matches!(nodes[i].kind, Kind::Call { .. });
if nodes.is_cfg(i) && !is_call {
continue;
}
push_up(nodes, i);
if idepth(nodes, i) > idepth(nodes, max) {
max = if is_call { i } else { idom(nodes, i) };
}
}
if max == 0 {
return;
}
let index = nodes[0].outputs.iter().position(|&p| p == node).unwrap();
nodes[0].outputs.remove(index);
nodes[node].inputs[0] = max;
debug_assert!(
!nodes[max].outputs.contains(&node)
|| matches!(nodes[max].kind, Kind::Call { .. }),
"{node} {:?} {max} {:?}",
nodes[node],
nodes[max]
);
nodes[max].outputs.push(node);
}
}
fn push_down(nodes: &mut Nodes, node: Nid) {
if !nodes.visited.set(node) {
return;
}
// TODO: handle memory nodes first
if nodes[node].kind.is_pinned() {
// TODO: use buffer to avoid allocation or better yet queue the location changes
for i in nodes[node].outputs.clone() {
push_down(nodes, i);
}
} else {
let mut min = None::<Nid>;
for i in 0..nodes[node].outputs.len() {
let i = nodes[node].outputs[i];
push_down(nodes, i);
let i = use_block(node, i, nodes);
min = min.map(|m| common_dom(i, m, nodes)).or(Some(i));
}
let mut min = min.unwrap();
let mut cursor = min;
loop {
if better(nodes, cursor, min) {
min = cursor;
}
if cursor == nodes[node].inputs[0] {
break;
}
cursor = idom(nodes, cursor);
}
if nodes[min].kind.ends_basic_block() {
min = idom(nodes, min);
}
let prev = nodes[node].inputs[0];
if min != prev {
let index = nodes[prev].outputs.iter().position(|&p| p == node).unwrap();
nodes[prev].outputs.remove(index);
nodes[node].inputs[0] = min;
nodes[min].outputs.push(node);
}
}
}
fn use_block(target: Nid, from: Nid, nodes: &mut Nodes) -> Nid {
if nodes[from].kind != Kind::Phi {
return idom(nodes, from);
}
let index = nodes[from].inputs.iter().position(|&n| n == target).unwrap();
nodes[nodes[from].inputs[0]].inputs[index - 1]
}
fn common_dom(mut a: Nid, mut b: Nid, nodes: &mut Nodes) -> Nid {
while a != b {
let [ldepth, rdepth] = [idepth(nodes, a), idepth(nodes, b)];
if ldepth >= rdepth {
a = idom(nodes, a);
}
if ldepth <= rdepth {
b = idom(nodes, b);
}
}
a
}
self.ci.nodes.visited.clear(self.ci.nodes.values.len());
push_up(&mut self.ci.nodes, self.ci.end);
// TODO: handle infinte loops
self.ci.nodes.visited.clear(self.ci.nodes.values.len());
push_down(&mut self.ci.nodes, self.ci.start);
}
}
#[cfg(test)]
mod tests {
use std::fmt::Write;
const README: &str = include_str!("../README.md");
fn generate(ident: &'static str, input: &'static str, output: &mut String) {
let mut codegen =
super::Codegen { files: crate::test_parse_files(ident, input), ..Default::default() };
codegen.generate();
{
let errors = codegen.errors.borrow();
if !errors.is_empty() {
output.push_str(&errors);
return;
}
}
let mut out = Vec::new();
codegen.tys.assemble(&mut out);
let mut buf = Vec::<u8>::new();
let err = codegen.tys.disasm(&out, &codegen.files, &mut buf, |_| {});
output.push_str(String::from_utf8(buf).unwrap().as_str());
if let Err(e) = err {
writeln!(output, "!!! asm is invalid: {e}").unwrap();
return;
}
crate::test_run_vm(&out, output);
}
crate::run_tests! { generate:
arithmetic => README;
variables => README;
functions => README;
comments => README;
if_statements => README;
loops => README;
//fb_driver => README;
//pointers => README;
//structs => README;
//different_types => README;
//struct_operators => README;
//directives => README;
//global_variables => README;
//generic_types => README;
//generic_functions => README;
//c_strings => README;
//struct_patterns => README;
//arrays => README;
//struct_return_from_module_function => README;
////comptime_pointers => README;
//sort_something_viredly => README;
hex_octal_binary_literals => README;
//comptime_min_reg_leak => README;
////structs_in_registers => README;
//comptime_function_from_another_file => README;
//inline => README;
//inline_test => README;
const_folding_with_arg => README;
// FIXME: contains redundant copies
branch_assignments => README;
exhaustive_loop_testing => README;
}
}
Reference in a new issue View git blame Copy permalink