forked from AbleOS/holey-bytes
fixing code scheduling bugs
This commit is contained in:
Jakub Doka
parent
89cc611f7a
commit
6ad0b41759
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@ -452,6 +452,8 @@ mod ty {
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builtin_type! {
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UNDECLARED;
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LEFT_UNREACHABLE;
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RIGHT_UNREACHABLE;
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NEVER;
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VOID;
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TYPE;
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@ -464,8 +466,7 @@ mod ty {
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I16;
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I32;
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INT;
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LEFT_UNREACHABLE;
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RIGHT_UNREACHABLE;
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}
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macro_rules! type_kind {
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@ -210,7 +210,9 @@ impl<'a, 'b> Parser<'a, 'b> {
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);
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}
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let index = self.ctx.idents.binary_search_by_key(&id, |s| s.ident).expect("fck up");
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let Ok(index) = self.ctx.idents.binary_search_by_key(&id, |s| s.ident) else {
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self.report(pos, "the identifier is rezerved for a builtin (proably)");
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};
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if core::mem::replace(&mut self.ctx.idents[index].declared, true) {
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self.report(
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pos,
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445
lang/src/son.rs
445
lang/src/son.rs
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@ -9,8 +9,7 @@ use {
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idfl::{self},
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Expr, ExprRef, FileId, Pos,
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},
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reg, task,
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ty::{self},
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reg, task, ty,
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vc::{BitSet, Vc},
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Func, HashMap, Offset, OffsetIter, Reloc, Sig, SymKey, TypedReloc, Types,
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},
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@ -35,6 +34,16 @@ type Nid = u16;
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type Lookup = crate::ctx_map::CtxMap<Nid>;
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trait StoreId: Sized {
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fn to_store(self) -> Option<Self>;
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}
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impl StoreId for Nid {
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fn to_store(self) -> Option<Self> {
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(self != NEVER).then_some(self)
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}
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}
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impl crate::ctx_map::CtxEntry for Nid {
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type Ctx = [Result<Node, Nid>];
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type Key<'a> = (Kind, &'a [Nid], ty::Id);
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@ -416,7 +425,7 @@ impl Nodes {
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Kind::Stck => write!(out, "stck: "),
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Kind::Load => write!(out, "load: "),
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Kind::Stre => write!(out, "stre: "),
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_ => unreachable!(),
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Kind::Mem => write!(out, " mem: "),
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}?;
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if self[node].kind != Kind::Loop && self[node].kind != Kind::Region {
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@ -613,26 +622,48 @@ impl Nodes {
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target
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}
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fn load_loop_value(&mut self, index: usize, value: &mut Value, loops: &mut [Loop]) {
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if value.id != 0 {
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debug_assert!(!value.var);
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fn load_loop_var(&mut self, index: usize, value: &mut Nid, loops: &mut [Loop]) {
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self.load_loop_value(
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&mut |l| {
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l.scope
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.vars
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.get_mut(index)
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.map_or((ty::Id::VOID, &mut l.scope.store), |v| (v.ty, &mut v.value))
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},
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value,
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loops,
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);
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}
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fn load_loop_store(&mut self, value: &mut Nid, loops: &mut [Loop]) {
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self.load_loop_value(&mut |l| (ty::Id::VOID, &mut l.scope.store), value, loops);
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}
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fn load_loop_value(
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&mut self,
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get_lvalue: &mut impl FnMut(&mut Loop) -> (ty::Id, &mut Nid),
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value: &mut Nid,
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loops: &mut [Loop],
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) {
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if *value != VOID {
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return;
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}
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let [loob, loops @ ..] = loops else { unreachable!() };
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let lvalue = &mut loob.scope.vars[index].value;
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let node = loob.node;
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let (ty, lvalue) = get_lvalue(loob);
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self.load_loop_value(index, lvalue, loops);
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self.load_loop_value(get_lvalue, lvalue, loops);
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if !self[lvalue.id].is_lazy_phi() {
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self.unlock(value.id);
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let inps = [loob.node, lvalue.id, VOID];
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self.unlock(lvalue.id);
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lvalue.id = self.new_node_nop(lvalue.ty, Kind::Phi, inps);
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self[lvalue.id].lock_rc += 2;
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if !self[*lvalue].is_lazy_phi() {
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self.unlock(*value);
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let inps = [node, *lvalue, VOID];
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self.unlock(*lvalue);
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*lvalue = self.new_node_nop(ty, Kind::Phi, inps);
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self[*lvalue].lock_rc += 2;
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} else {
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self.lock(lvalue.id);
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self.unlock(value.id);
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self.lock(*lvalue);
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self.unlock(*value);
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}
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*value = *lvalue;
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}
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@ -679,26 +710,26 @@ impl Nodes {
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}
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fn lock_scope(&mut self, scope: &Scope) {
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if let Some(str) = scope.store {
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if let Some(str) = scope.store.to_store() {
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self.lock(str);
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}
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for &load in &scope.loads {
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self.lock(load);
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}
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for var in &scope.vars {
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self.lock(var.value.id);
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self.lock(var.value);
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}
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}
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fn unlock_remove_scope(&mut self, scope: &Scope) {
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if let Some(str) = scope.store {
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if let Some(str) = scope.store.to_store() {
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self.unlock_remove(str);
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}
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for &load in &scope.loads {
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self.unlock_remove(load);
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}
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for var in &scope.vars {
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self.unlock_remove(var.value.id);
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self.unlock_remove(var.value);
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}
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}
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}
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@ -768,7 +799,7 @@ pub enum Kind {
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impl Kind {
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fn is_pinned(&self) -> bool {
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self.is_cfg() || matches!(self, Self::Phi | Self::Mem)
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self.is_cfg() || matches!(self, Self::Phi | Self::Mem | Self::Arg { .. })
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}
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fn is_cfg(&self) -> bool {
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@ -780,7 +811,6 @@ impl Kind {
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| Self::Entry
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| Self::Then
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| Self::Else
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| Self::Arg { .. }
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| Self::Call { .. }
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| Self::If
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| Self::Region
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@ -850,14 +880,24 @@ struct Loop {
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#[derive(Clone, Copy)]
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struct Variable {
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id: Ident,
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value: Value,
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ty: ty::Id,
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value: Nid,
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}
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#[derive(Default, Clone)]
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struct Scope {
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vars: Vec<Variable>,
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loads: Vec<Nid>,
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store: Option<Nid>,
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store: Nid,
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}
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impl Scope {
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pub fn iter_elems_mut(&mut self) -> impl Iterator<Item = (ty::Id, &mut Nid)> {
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self.vars
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.iter_mut()
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.map(|v| (v.ty, &mut v.value))
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.chain(core::iter::once((ty::Id::VOID, &mut self.store)))
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}
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}
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#[derive(Default)]
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@ -943,7 +983,7 @@ impl Default for Regalloc {
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}
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}
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#[derive(Default, Clone, Copy)]
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#[derive(Default, Clone, Copy, PartialEq, Eq)]
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struct Value {
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ty: ty::Id,
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var: bool,
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@ -1025,8 +1065,13 @@ impl Codegen {
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}
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fn store_mem(&mut self, region: Nid, value: Nid) -> Nid {
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if value == NEVER {
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return NEVER;
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}
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let mut vc = Vc::from([VOID, value, region]);
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if let Some(str) = self.ci.scope.store {
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self.ci.nodes.load_loop_store(&mut self.ci.scope.store, &mut self.ci.loops);
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if let Some(str) = self.ci.scope.store.to_store() {
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self.ci.nodes.unlock(str);
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vc.push(str);
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}
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@ -1041,13 +1086,15 @@ impl Codegen {
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}
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let store = self.ci.nodes.new_node(self.tof(value), Kind::Stre, vc);
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self.ci.nodes.lock(store);
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self.ci.scope.store = Some(store);
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self.ci.scope.store = store;
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store
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}
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fn load_mem(&mut self, region: Nid, ty: ty::Id) -> Nid {
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debug_assert_ne!(region, VOID);
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let mut vc = Vc::from([VOID, region]);
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if let Some(str) = self.ci.scope.store {
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self.ci.nodes.load_loop_store(&mut self.ci.scope.store, &mut self.ci.loops);
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if let Some(str) = self.ci.scope.store.to_store() {
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vc.push(str);
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}
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let load = self.ci.nodes.new_node(ty, Kind::Load, vc);
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@ -1086,14 +1133,13 @@ impl Codegen {
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return Value::NEVER;
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};
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self.ci.nodes.load_loop_value(
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self.ci.nodes.load_loop_var(
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index,
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&mut self.ci.scope.vars[index].value,
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&mut self.ci.loops,
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);
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debug_assert_ne!(self.ci.scope.vars[index].value.ty, ty::Id::VOID);
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Some(Value::var(index).ty(self.ci.scope.vars[index].value.ty))
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Some(Value::var(index).ty(self.ci.scope.vars[index].ty))
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}
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Expr::Number { value, .. } => Some(self.ci.nodes.new_node_lit(
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ctx.ty.filter(|ty| ty.is_integer() || ty.is_pointer()).unwrap_or(ty::Id::INT),
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@ -1108,8 +1154,9 @@ impl Codegen {
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};
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let mut inps = Vc::from([self.ci.ctrl, value.id]);
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for &m in self.ci.scope.store.iter() {
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inps.push(m);
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self.ci.nodes.load_loop_store(&mut self.ci.scope.store, &mut self.ci.loops);
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if let Some(str) = self.ci.scope.store.to_store() {
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inps.push(str);
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}
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self.ci.ctrl = self.ci.nodes.new_node(ty::Id::VOID, Kind::Return, inps);
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@ -1202,7 +1249,7 @@ impl Codegen {
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Expr::BinOp { left: &Expr::Ident { id, .. }, op: TokenKind::Decl, right } => {
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let value = self.expr(right)?;
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self.ci.nodes.lock(value.id);
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self.ci.scope.vars.push(Variable { id, value });
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self.ci.scope.vars.push(Variable { id, value: value.id, ty: value.ty });
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Some(Value::VOID)
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}
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Expr::BinOp { left, op: TokenKind::Assign, right } => {
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@ -1214,8 +1261,8 @@ impl Codegen {
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if dest.var {
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self.ci.nodes.lock(value.id);
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let var = &mut self.ci.scope.vars[(u16::MAX - dest.id) as usize];
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let prev = core::mem::replace(&mut var.value, value);
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self.ci.nodes.unlock_remove(prev.id);
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let prev = core::mem::replace(&mut var.value, value.id);
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self.ci.nodes.unlock_remove(prev);
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} else if dest.ptr {
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self.store_mem(dest.id, value.id);
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} else {
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@ -1242,6 +1289,10 @@ impl Codegen {
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[VOID],
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))
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}
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Expr::Directive { name: "as", args: [ty, expr], .. } => {
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let ctx = Ctx::default().with_ty(self.ty(ty));
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self.expr_ctx(expr, ctx)
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}
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Expr::Call { func: &Expr::Ident { pos, id, .. }, args, .. } => {
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self.ci.call_count += 1;
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let cfile = self.cfile().clone();
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@ -1294,7 +1345,7 @@ impl Codegen {
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inps.push(value.id);
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}
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if let Some(str) = self.ci.scope.store {
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if let Some(str) = self.ci.scope.store.to_store() {
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inps.push(str);
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}
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for load in self.ci.scope.loads.drain(..) {
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@ -1317,6 +1368,59 @@ impl Codegen {
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Some(Value::new(self.ci.ctrl).ty(sig.ret))
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}
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Expr::Tupl { pos, ty, fields, .. } => {
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let Some(sty) = ty.map(|ty| self.ty(ty)).or(ctx.ty) else {
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self.report(
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pos,
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"the type of struct cannot be inferred from context, \
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use an explicit type instead: <type>.{ ... }",
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);
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return Value::NEVER;
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};
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let ty::Kind::Struct(s) = sty.expand() else {
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let inferred = if ty.is_some() { "" } else { "inferred " };
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self.report(
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pos,
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fa!(
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"the {inferred}type of the constructor is `{}`, \
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but thats not a struct",
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self.ty_display(sty)
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),
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);
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return Value::NEVER;
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};
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// TODO: dont allocate
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let mut offs = OffsetIter::new(s, &self.tys);
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let mem = self.ci.nodes.new_node(sty, Kind::Stck, [VOID, MEM]);
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for field in fields {
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let Some((ty, offset)) = offs.next_ty(&self.tys) else {
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self.report(field.pos(), "this init argumen overflows the field count");
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break;
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};
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let value = self.expr_ctx(field, Ctx::default().with_ty(ty))?;
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let mem = self.offset(mem, ty, offset);
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self.store_mem(mem, value.id);
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}
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let field_list = offs
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.into_iter(&self.tys)
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.map(|(f, ..)| self.tys.names.ident_str(f.name))
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.intersperse(", ")
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.collect::<String>();
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if !field_list.is_empty() {
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self.report(
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pos,
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fa!("the struct initializer is missing {field_list} \
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(append them to the end of the constructor)"),
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);
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}
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Some(Value::ptr(mem).ty(sty))
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}
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Expr::Ctor { pos, ty, fields, .. } => {
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let Some(sty) = ty.map(|ty| self.ty(ty)).or(ctx.ty) else {
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self.report(
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|
|
@ -1400,7 +1504,7 @@ impl Codegen {
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self.ci.nodes.lock(self.ci.ctrl);
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for var in self.ci.scope.vars.drain(base..) {
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self.ci.nodes.unlock_remove(var.value.id);
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self.ci.nodes.unlock_remove(var.value);
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}
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self.ci.nodes.unlock(self.ci.ctrl);
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|
|
@ -1415,8 +1519,8 @@ impl Codegen {
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scope: self.ci.scope.clone(),
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});
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for var in &mut self.ci.scope.vars {
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var.value = Value::VOID;
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for (_, var) in &mut self.ci.scope.iter_elems_mut() {
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*var = VOID;
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}
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self.ci.nodes.lock_scope(&self.ci.scope);
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|
|
@ -1461,66 +1565,50 @@ impl Codegen {
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core::mem::swap(&mut self.ci.scope, &mut bres);
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for ((dest_var, mut scope_var), loop_var) in
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self.ci.scope.vars.iter_mut().zip(scope.vars.drain(..)).zip(bres.vars.drain(..))
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for (((_, dest_value), (_, &mut mut scope_value)), (_, &mut loop_value)) in self
|
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.ci
|
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.scope
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.iter_elems_mut()
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.zip(scope.iter_elems_mut())
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.zip(bres.iter_elems_mut())
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{
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self.ci.nodes.unlock(loop_var.value.id);
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self.ci.nodes.unlock(loop_value);
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if loop_var.value.id != VOID {
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self.ci.nodes.unlock(scope_var.value.id);
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if loop_var.value.id != scope_var.value.id {
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scope_var.value.id = self.ci.nodes.modify_input(
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scope_var.value.id,
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2,
|
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loop_var.value.id,
|
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);
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self.ci.nodes.lock(scope_var.value.id);
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if loop_value != VOID {
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self.ci.nodes.unlock(scope_value);
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if loop_value != scope_value {
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scope_value = self.ci.nodes.modify_input(scope_value, 2, loop_value);
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self.ci.nodes.lock(scope_value);
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} else {
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if dest_var.value.id == scope_var.value.id {
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self.ci.nodes.unlock(dest_var.value.id);
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dest_var.value.id = VOID;
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self.ci.nodes.lock(dest_var.value.id);
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if *dest_value == scope_value {
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self.ci.nodes.unlock(*dest_value);
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*dest_value = VOID;
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self.ci.nodes.lock(*dest_value);
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}
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let phi = &self.ci.nodes[scope_var.value.id];
|
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let phi = &self.ci.nodes[scope_value];
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debug_assert_eq!(phi.kind, Kind::Phi);
|
||||
debug_assert_eq!(phi.inputs[2], VOID);
|
||||
debug_assert_eq!(phi.ty, scope_var.value.ty);
|
||||
let prev = phi.inputs[1];
|
||||
self.ci.nodes.replace(scope_var.value.id, prev);
|
||||
scope_var.value.id = prev;
|
||||
self.ci.nodes.replace(scope_value, prev);
|
||||
scope_value = prev;
|
||||
self.ci.nodes.lock(prev);
|
||||
}
|
||||
}
|
||||
|
||||
if dest_var.value.id == VOID {
|
||||
self.ci.nodes.unlock(dest_var.value.id);
|
||||
dest_var.value = scope_var.value;
|
||||
self.ci.nodes.lock(dest_var.value.id);
|
||||
if *dest_value == VOID {
|
||||
self.ci.nodes.unlock(*dest_value);
|
||||
*dest_value = scope_value;
|
||||
self.ci.nodes.lock(*dest_value);
|
||||
}
|
||||
|
||||
debug_assert!(
|
||||
self.ci.nodes[dest_var.value.id].kind != Kind::Phi
|
||||
|| self.ci.nodes[dest_var.value.id].inputs[2] != 0
|
||||
self.ci.nodes[*dest_value].kind != Kind::Phi
|
||||
|| self.ci.nodes[*dest_value].inputs[2] != 0
|
||||
);
|
||||
|
||||
self.ci.nodes.unlock_remove(scope_var.value.id);
|
||||
self.ci.nodes.unlock_remove(scope_value);
|
||||
}
|
||||
|
||||
if bres.store != scope.store {
|
||||
let (to_store, from_store, prev) =
|
||||
(bres.store.unwrap(), scope.store.unwrap(), self.ci.scope.store.unwrap());
|
||||
self.ci.nodes.unlock_remove(prev);
|
||||
self.ci.scope.store = Some(
|
||||
self.ci
|
||||
.nodes
|
||||
.new_node(ty::Id::VOID, Kind::Phi, [node, from_store, to_store]),
|
||||
);
|
||||
self.ci.nodes.lock(self.ci.scope.store.unwrap());
|
||||
}
|
||||
|
||||
self.ci.nodes.unlock_remove_scope(&scope);
|
||||
self.ci.nodes.unlock_remove_scope(&bres);
|
||||
|
||||
self.ci.nodes.unlock(self.ci.ctrl);
|
||||
|
||||
Some(Value::VOID)
|
||||
|
|
@ -1551,8 +1639,9 @@ impl Codegen {
|
|||
}
|
||||
}
|
||||
|
||||
self.ci.nodes.load_loop_store(&mut self.ci.scope.store, &mut self.ci.loops);
|
||||
let orig_store = self.ci.scope.store;
|
||||
if let Some(str) = orig_store {
|
||||
if let Some(str) = orig_store.to_store() {
|
||||
self.ci.nodes.lock(str);
|
||||
}
|
||||
let else_scope = self.ci.scope.clone();
|
||||
|
|
@ -1569,7 +1658,7 @@ impl Codegen {
|
|||
self.ci.ctrl
|
||||
};
|
||||
|
||||
if let Some(str) = orig_store {
|
||||
if let Some(str) = orig_store.to_store() {
|
||||
self.ci.nodes.unlock_remove(str);
|
||||
}
|
||||
|
||||
|
|
@ -1628,12 +1717,8 @@ impl Codegen {
|
|||
fn strip_var(&mut self, n: &mut Value) {
|
||||
if core::mem::take(&mut n.var) {
|
||||
let id = (u16::MAX - n.id) as usize;
|
||||
self.ci.nodes.load_loop_value(
|
||||
id,
|
||||
&mut self.ci.scope.vars[id].value,
|
||||
&mut self.ci.loops,
|
||||
);
|
||||
*n = self.ci.scope.vars[id].value;
|
||||
self.ci.nodes.load_loop_var(id, &mut self.ci.scope.vars[id].value, &mut self.ci.loops);
|
||||
n.id = self.ci.scope.vars[id].value;
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -1683,32 +1768,26 @@ impl Codegen {
|
|||
from: &mut Scope,
|
||||
drop_from: bool,
|
||||
) {
|
||||
for (i, (to_var, from_var)) in to.vars.iter_mut().zip(&mut from.vars).enumerate() {
|
||||
if to_var.value.id != from_var.value.id {
|
||||
nodes.load_loop_value(i, &mut from_var.value, loops);
|
||||
nodes.load_loop_value(i, &mut to_var.value, loops);
|
||||
if to_var.value.id != from_var.value.id {
|
||||
let ty = nodes[to_var.value.id].ty;
|
||||
debug_assert_eq!(ty, nodes[from_var.value.id].ty, "TODO: typecheck properly");
|
||||
|
||||
let inps = [ctrl, from_var.value.id, to_var.value.id];
|
||||
nodes.unlock(to_var.value.id);
|
||||
to_var.value.id = nodes.new_node(ty, Kind::Phi, inps);
|
||||
nodes.lock(to_var.value.id);
|
||||
for (i, ((ty, to_value), (_, from_value))) in
|
||||
to.iter_elems_mut().zip(from.iter_elems_mut()).enumerate()
|
||||
{
|
||||
if to_value != from_value {
|
||||
nodes.load_loop_var(i, from_value, loops);
|
||||
nodes.load_loop_var(i, to_value, loops);
|
||||
if to_value != from_value {
|
||||
let inps = [ctrl, *from_value, *to_value];
|
||||
nodes.unlock(*to_value);
|
||||
*to_value = nodes.new_node(ty, Kind::Phi, inps);
|
||||
nodes.lock(*to_value);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if to.store != from.store {
|
||||
let (to_store, from_store) = (to.store.unwrap(), from.store.unwrap());
|
||||
nodes.unlock(to_store);
|
||||
to.store = Some(nodes.new_node(ty::Id::VOID, Kind::Phi, [ctrl, from_store, to_store]));
|
||||
nodes.lock(to.store.unwrap());
|
||||
for load in to.loads.drain(..) {
|
||||
nodes.unlock_remove(load);
|
||||
}
|
||||
|
||||
to.loads.extend(&from.loads);
|
||||
for &load in &from.loads {
|
||||
nodes.lock(load);
|
||||
for load in from.loads.drain(..) {
|
||||
nodes.unlock_remove(load);
|
||||
}
|
||||
|
||||
if drop_from {
|
||||
|
|
@ -1756,6 +1835,8 @@ impl Codegen {
|
|||
let mem = self.ci.nodes.new_node(ty::Id::VOID, Kind::Mem, [VOID]);
|
||||
debug_assert_eq!(mem, MEM);
|
||||
self.ci.nodes.lock(mem);
|
||||
self.ci.nodes.lock(end);
|
||||
self.ci.scope.store = end;
|
||||
|
||||
let Expr::BinOp {
|
||||
left: Expr::Ident { .. },
|
||||
|
|
@ -1773,7 +1854,7 @@ impl Codegen {
|
|||
self.ci.nodes.lock(value);
|
||||
let sym = parser::find_symbol(&ast.symbols, arg.id);
|
||||
assert!(sym.flags & idfl::COMPTIME == 0, "TODO");
|
||||
self.ci.scope.vars.push(Variable { id: arg.id, value: Value::new(value).ty(ty) });
|
||||
self.ci.scope.vars.push(Variable { id: arg.id, value, ty });
|
||||
}
|
||||
|
||||
let orig_vars = self.ci.scope.vars.clone();
|
||||
|
|
@ -1782,6 +1863,7 @@ impl Codegen {
|
|||
self.report(body.pos(), "expected all paths in the fucntion to return");
|
||||
}
|
||||
|
||||
self.ci.nodes.unlock(end);
|
||||
self.ci.nodes.unlock(end);
|
||||
|
||||
self.ci.nodes.unlock_remove_scope(&core::mem::take(&mut self.ci.scope));
|
||||
|
|
@ -2207,16 +2289,13 @@ impl Codegen {
|
|||
#[track_caller]
|
||||
fn report(&self, pos: Pos, msg: impl core::fmt::Display) {
|
||||
let mut buf = self.errors.borrow_mut();
|
||||
writeln!(buf, "{}", self.cfile().report(pos, msg)).unwrap();
|
||||
write!(buf, "{}", self.cfile().report(pos, msg)).unwrap();
|
||||
}
|
||||
|
||||
#[track_caller]
|
||||
fn report_unhandled_ast(&self, ast: &Expr, hint: &str) {
|
||||
log::debug!("{ast:#?}");
|
||||
self.fatal_report(
|
||||
ast.pos(),
|
||||
fa!("compiler does not (yet) know how to handle ({hint}):\n{}", self.ast_display(ast)),
|
||||
);
|
||||
self.fatal_report(ast.pos(), fa!("compiler does not (yet) know how to handle ({hint})"));
|
||||
}
|
||||
|
||||
fn cfile(&self) -> &parser::Ast {
|
||||
|
|
@ -2230,7 +2309,7 @@ impl Codegen {
|
|||
|
||||
fn gcm(&mut self) {
|
||||
self.ci.nodes.visited.clear(self.ci.nodes.values.len());
|
||||
push_up(&mut self.ci.nodes, NEVER);
|
||||
push_up(&mut self.ci.nodes);
|
||||
// TODO: handle infinte loops
|
||||
self.ci.nodes.visited.clear(self.ci.nodes.values.len());
|
||||
push_down(&mut self.ci.nodes, VOID);
|
||||
|
|
@ -2586,8 +2665,8 @@ impl<'a> Function<'a> {
|
|||
self.add_instr(nid, ops);
|
||||
}
|
||||
}
|
||||
Kind::Stre { .. } if node.inputs[2] == VOID => self.nodes.lock(nid),
|
||||
Kind::Stre { .. } => {
|
||||
Kind::Stre if node.inputs[2] == VOID => self.nodes.lock(nid),
|
||||
Kind::Stre => {
|
||||
let mut region = node.inputs[2];
|
||||
if self.nodes[region].kind == (Kind::BinOp { op: TokenKind::Add })
|
||||
&& self.nodes.is_const(self.nodes[region].inputs[2])
|
||||
|
|
@ -2751,18 +2830,12 @@ fn loop_depth(target: Nid, nodes: &mut Nodes) -> LoopDepth {
|
|||
depth
|
||||
}
|
||||
Kind::Start | Kind::End => 1,
|
||||
_ => unreachable!(),
|
||||
u => unreachable!("{u:?}"),
|
||||
};
|
||||
|
||||
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 == VOID {
|
||||
return 0;
|
||||
|
|
@ -2779,71 +2852,116 @@ fn idepth(nodes: &mut Nodes, target: Nid) -> IDomDepth {
|
|||
nodes[target].depth
|
||||
}
|
||||
|
||||
fn push_up(nodes: &mut Nodes, node: Nid) {
|
||||
fn push_up(nodes: &mut Nodes) {
|
||||
fn collect_rpo(node: Nid, nodes: &mut Nodes, rpo: &mut Vec<Nid>) {
|
||||
if !nodes.is_cfg(node) || !nodes.visited.set(node) {
|
||||
return;
|
||||
}
|
||||
|
||||
for i in 0..nodes[node].outputs.len() {
|
||||
collect_rpo(nodes[node].outputs[i], nodes, rpo);
|
||||
}
|
||||
rpo.push(node);
|
||||
}
|
||||
|
||||
fn push_up_impl(node: Nid, nodes: &mut Nodes) {
|
||||
if !nodes.visited.set(node) {
|
||||
return;
|
||||
}
|
||||
|
||||
for i in 0..nodes[node].inputs.len() {
|
||||
let inp = nodes[node].inputs[i];
|
||||
if !nodes[inp].kind.is_pinned() {
|
||||
push_up_impl(inp, nodes);
|
||||
}
|
||||
}
|
||||
|
||||
if nodes[node].kind.is_pinned() {
|
||||
for i in 0..nodes[node].inputs.len() {
|
||||
let i = nodes[node].inputs[i];
|
||||
push_up(nodes, i);
|
||||
return;
|
||||
}
|
||||
} else {
|
||||
let mut max = VOID;
|
||||
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) };
|
||||
|
||||
let mut deepest = VOID;
|
||||
for i in 1..nodes[node].inputs.len() {
|
||||
let inp = nodes[node].inputs[i];
|
||||
if idepth(nodes, inp) > idepth(nodes, deepest) {
|
||||
deepest = idom(nodes, inp);
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(debug_assertions)]
|
||||
{
|
||||
nodes.check_dominance(node, max, false);
|
||||
}
|
||||
|
||||
if max == VOID {
|
||||
if deepest == VOID {
|
||||
return;
|
||||
}
|
||||
|
||||
let index = nodes[0].outputs.iter().position(|&p| p == node).unwrap();
|
||||
nodes[0].outputs.remove(index);
|
||||
nodes[node].inputs[0] = max;
|
||||
nodes[node].inputs[0] = deepest;
|
||||
debug_assert!(
|
||||
!nodes[max].outputs.contains(&node) || matches!(nodes[max].kind, Kind::Call { .. }),
|
||||
"{node} {:?} {max} {:?}",
|
||||
!nodes[deepest].outputs.contains(&node)
|
||||
|| matches!(nodes[deepest].kind, Kind::Call { .. }),
|
||||
"{node} {:?} {deepest} {:?}",
|
||||
nodes[node],
|
||||
nodes[max]
|
||||
nodes[deepest]
|
||||
);
|
||||
nodes[max].outputs.push(node);
|
||||
nodes[deepest].outputs.push(node);
|
||||
}
|
||||
|
||||
let mut rpo = vec![];
|
||||
|
||||
collect_rpo(VOID, nodes, &mut rpo);
|
||||
|
||||
for node in rpo.into_iter().rev() {
|
||||
loop_depth(node, nodes);
|
||||
for i in 0..nodes[node].inputs.len() {
|
||||
push_up_impl(nodes[node].inputs[i], nodes);
|
||||
}
|
||||
|
||||
if matches!(nodes[node].kind, Kind::Loop | Kind::Region) {
|
||||
for i in 0..nodes[node].outputs.len() {
|
||||
let usage = nodes[node].outputs[i];
|
||||
if nodes[usage].kind == Kind::Phi {
|
||||
push_up_impl(usage, nodes);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn push_down(nodes: &mut Nodes, node: Nid) {
|
||||
fn is_forward_edge(usage: Nid, def: Nid, nodes: &mut Nodes) -> bool {
|
||||
match nodes[usage].kind {
|
||||
Kind::Phi => {
|
||||
nodes[usage].inputs[2] != def || nodes[nodes[usage].inputs[0]].kind != Kind::Loop
|
||||
}
|
||||
Kind::Loop => nodes[usage].inputs[1] != def,
|
||||
_ => true,
|
||||
}
|
||||
}
|
||||
|
||||
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
|
||||
}
|
||||
|
||||
if !nodes.visited.set(node) {
|
||||
return;
|
||||
}
|
||||
|
||||
// TODO: handle memory nodes first
|
||||
for usage in nodes[node].outputs.clone() {
|
||||
if is_forward_edge(usage, node, nodes) {
|
||||
push_down(nodes, usage);
|
||||
}
|
||||
}
|
||||
|
||||
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);
|
||||
return;
|
||||
}
|
||||
} 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 usage = nodes[node].outputs[i];
|
||||
let ub = use_block(node, usage, nodes);
|
||||
min = min.map(|m| common_dom(ub, m, nodes)).or(Some(ub));
|
||||
}
|
||||
let mut min = min.unwrap();
|
||||
|
||||
|
|
@ -2876,7 +2994,6 @@ fn push_down(nodes: &mut Nodes, node: Nid) {
|
|||
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 {
|
||||
|
|
@ -2966,7 +3083,7 @@ mod tests {
|
|||
//generic_functions;
|
||||
//c_strings;
|
||||
//struct_patterns;
|
||||
//arrays;
|
||||
arrays;
|
||||
//struct_return_from_module_function;
|
||||
////comptime_pointers;
|
||||
//sort_something_viredly;
|
||||
|
|
|
|||
|
|
@ -38,16 +38,15 @@ odher_pass:
|
|||
ADDI64 r254, r254, 40d
|
||||
JALA r0, r31, 0a
|
||||
pass:
|
||||
ADDI64 r254, r254, -40d
|
||||
ST r31, r254, 0a, 40h
|
||||
ADDI64 r254, r254, -32d
|
||||
ST r31, r254, 0a, 32h
|
||||
CP r32, r2
|
||||
CP r33, r32
|
||||
LD r34, r33, 0a, 8h
|
||||
LD r35, r33, 8a, 8h
|
||||
SUB64 r1, r34, r35
|
||||
LD r31, r254, 0a, 40h
|
||||
ADDI64 r254, r254, 40d
|
||||
LD r33, r32, 0a, 8h
|
||||
LD r34, r32, 8a, 8h
|
||||
SUB64 r1, r33, r34
|
||||
LD r31, r254, 0a, 32h
|
||||
ADDI64 r254, r254, 32d
|
||||
JALA r0, r31, 0a
|
||||
code size: 440
|
||||
code size: 437
|
||||
ret: 3
|
||||
status: Ok(())
|
||||
|
|
|
|||
|
|
@ -0,0 +1,17 @@
|
|||
main:
|
||||
ADDI64 r254, r254, -8d
|
||||
LI64 r4, 0d
|
||||
LI64 r2, 10d
|
||||
ADDI64 r5, r254, 0d
|
||||
ST r2, r254, 0a, 8h
|
||||
2: LD r1, r254, 0a, 8h
|
||||
JNE r1, r4, :0
|
||||
JMP :1
|
||||
0: ADDI64 r1, r1, -1d
|
||||
ST r1, r254, 0a, 8h
|
||||
JMP :2
|
||||
1: ADDI64 r254, r254, 8d
|
||||
JALA r0, r31, 0a
|
||||
code size: 137
|
||||
ret: 0
|
||||
status: Ok(())
|
||||
Loading…
Reference in a new issue