removing false positives
This commit is contained in:
parent
dc418bd5e0
commit
641d344d2d
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@ -337,6 +337,8 @@ foo := fn(a: int, b: int, c: int): int {
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#### idk
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```hb
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_edge_case := @as(int, idk)
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main := fn(): int {
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big_array := @as([u8; 128], idk)
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i := 0
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@ -1648,12 +1648,15 @@ impl Codegen {
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};
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if ctx.loc.is_some() {
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self.report(
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pos,
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"`idk` would be written to an existing memory location \
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which at ths point does notthing so its prohibited. TODO: make debug \
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builds write 0xAA instead.",
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);
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// self.report(
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// pos,
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// format_args!(
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// "`idk` would be written to an existing memory location \
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// which at ths point does notthing so its prohibited. TODO: make debug \
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// builds write 0xAA instead. Info for weak people: {:?}",
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// ctx.loc
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// ),
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// );
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}
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let loc = match self.tys.size_of(ty) {
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@ -15,7 +15,8 @@
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slice_ptr_get,
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slice_take,
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map_try_insert,
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extract_if
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extract_if,
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ptr_internals
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)]
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#![allow(internal_features, clippy::format_collect)]
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@ -18,8 +18,9 @@ use {
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collections::{hash_map, BTreeMap},
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fmt::{Display, Write},
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hash::{Hash as _, Hasher},
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mem,
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ops::{self, Range},
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mem::{self, MaybeUninit},
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ops::{self, Deref, DerefMut, Range},
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ptr::Unique,
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rc::Rc,
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},
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};
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@ -44,6 +45,108 @@ impl Drop for Drom {
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}
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}
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const VC_SIZE: usize = std::mem::size_of::<AllocedVc>();
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const INLINE_ELEMS: usize = VC_SIZE / std::mem::size_of::<Nid>() - 1;
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union Vc {
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inline: InlineVc,
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alloced: AllocedVc,
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}
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impl Vc {
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fn is_inline(&self) -> bool {
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unsafe { self.inline.len <= INLINE_ELEMS as u32 }
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}
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fn layout(&self) -> Option<std::alloc::Layout> {
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unsafe {
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self.is_inline()
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.then(|| std::alloc::Layout::array::<Nid>(self.alloced.cap as _).unwrap_unchecked())
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}
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}
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fn len(&self) -> usize {
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unsafe { self.inline.len as _ }
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}
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fn as_ptr(&self) -> *mut Nid {
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unsafe {
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match self.is_inline() {
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true => self.alloced.base.as_ptr(),
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false => { self.inline.elems }.as_mut_ptr().cast(),
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}
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}
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}
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fn as_slice(&self) -> &[Nid] {
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unsafe { std::slice::from_raw_parts(self.as_ptr(), self.len()) }
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}
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fn as_slice_mut(&mut self) -> &mut [Nid] {
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unsafe { std::slice::from_raw_parts_mut(self.as_ptr(), self.len()) }
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}
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}
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impl Drop for Vc {
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fn drop(&mut self) {
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if let Some(layout) = self.layout() {
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unsafe {
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std::alloc::dealloc(self.alloced.base.as_ptr().cast(), layout);
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}
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}
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}
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}
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impl Clone for Vc {
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fn clone(&self) -> Self {
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if self.is_inline() {
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unsafe { std::ptr::read(self) }
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} else {
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let layout = unsafe { std::alloc::Layout::array::<Nid>(self.len()).unwrap_unchecked() };
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let alloc = unsafe { std::alloc::alloc(layout) };
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unsafe { std::ptr::copy_nonoverlapping(self.as_ptr(), alloc.cast(), self.len()) };
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unsafe {
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Vc {
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alloced: AllocedVc {
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base: Unique::new_unchecked(alloc.cast()),
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len: self.alloced.len,
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cap: self.alloced.cap,
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},
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}
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}
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}
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}
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}
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impl Deref for Vc {
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type Target = [Nid];
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fn deref(&self) -> &Self::Target {
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self.as_slice()
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}
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}
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impl DerefMut for Vc {
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fn deref_mut(&mut self) -> &mut Self::Target {
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self.as_slice_mut()
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}
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}
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#[derive(Clone, Copy)]
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#[repr(C)]
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struct InlineVc {
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elems: MaybeUninit<[Nid; INLINE_ELEMS]>,
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len: Nid,
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}
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#[derive(Clone, Copy)]
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#[repr(C)]
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struct AllocedVc {
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base: Unique<Nid>,
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cap: u32,
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len: u32,
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}
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#[derive(Default)]
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struct BitSet {
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data: Vec<usize>,
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@ -539,8 +642,7 @@ impl Nodes {
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) -> Nid {
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let ty = ty.into();
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let node =
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Node { inputs: inps.into(), kind, color: 0, depth: 0, lock_rc: 0, ty, outputs: vec![] };
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let node = Node { inputs: inps.into(), kind, ty, ..Default::default() };
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let mut lookup_meta = None;
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if !node.is_lazy_phi() {
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@ -916,16 +1018,14 @@ impl Nodes {
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#[allow(clippy::format_in_format_args)]
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fn basic_blocks_instr(&mut self, out: &mut String, node: Nid) -> std::fmt::Result {
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if !self.visited.set(node as _) {
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return Ok(());
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}
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if self[node].kind != Kind::Loop && self[node].kind != Kind::Region {
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write!(out, " {node:>2}: ")?;
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}
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match self[node].kind {
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Kind::Start => unreachable!(),
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Kind::End => unreachable!(),
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Kind::If => write!(out, " if: "),
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Kind::Region => unreachable!(),
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Kind::Loop => unreachable!(),
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Kind::Region | Kind::Loop => writeln!(out, " goto: {node}"),
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Kind::Return => write!(out, " ret: "),
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Kind::CInt { value } => write!(out, "cint: #{value:<4}"),
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Kind::Phi => write!(out, " phi: "),
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@ -938,62 +1038,61 @@ impl Nodes {
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}
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}?;
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if self[node].kind != Kind::Loop && self[node].kind != Kind::Region {
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writeln!(
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out,
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" {:<14} {}",
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format!("{:?}", self[node].inputs),
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format!("{:?}", self[node].outputs)
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)
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)?;
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}
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Ok(())
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}
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fn basic_blocks_low(&mut self, out: &mut String, mut node: Nid) -> std::fmt::Result {
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let iter = |nodes: &Nodes, node| nodes[node].outputs.clone().into_iter().rev();
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while self.visited.set(node as _) {
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match dbg!(self[node].kind) {
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match self[node].kind {
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Kind::Start => {
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writeln!(out, "start: {}", self[node].depth)?;
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let mut cfg_index = Nid::MAX;
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for o in self[node].outputs.clone() {
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for o in iter(self, node) {
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self.basic_blocks_instr(out, o)?;
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if self[o].kind == (Kind::Tuple { index: 0 }) {
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cfg_index = o;
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continue;
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}
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self.basic_blocks_instr(out, o)?;
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}
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node = cfg_index;
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}
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Kind::End => break,
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Kind::If => {
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self.visited.unset(node as _);
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self.basic_blocks_instr(out, node)?;
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self.basic_blocks_low(out, self[node].outputs[0])?;
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node = self[node].outputs[1];
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}
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Kind::Region => {
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writeln!(out, "region{node}: {}", self[node].depth)?;
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let mut cfg_index = Nid::MAX;
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for o in self[node].outputs.clone().into_iter() {
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for o in iter(self, node) {
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self.basic_blocks_instr(out, o)?;
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if self.is_cfg(o) {
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cfg_index = o;
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continue;
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}
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self.basic_blocks_instr(out, o)?;
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}
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node = cfg_index;
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}
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Kind::Loop => {
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writeln!(out, "loop{node} {}", self[node].depth)?;
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writeln!(out, "loop{node}: {}", self[node].depth)?;
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let mut cfg_index = Nid::MAX;
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for o in self[node].outputs.clone().into_iter() {
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for o in iter(self, node) {
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self.basic_blocks_instr(out, o)?;
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if self.is_cfg(o) {
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cfg_index = o;
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continue;
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}
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self.basic_blocks_instr(out, o)?;
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}
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node = cfg_index;
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}
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Kind::Return => {
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self.visited.unset(node as _);
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self.basic_blocks_instr(out, node)?;
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node = self[node].outputs[0];
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}
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Kind::CInt { .. } => unreachable!(),
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@ -1001,34 +1100,24 @@ impl Nodes {
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Kind::Tuple { .. } => {
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writeln!(out, "b{node}: {}", self[node].depth)?;
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let mut cfg_index = Nid::MAX;
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for o in self[node].outputs.clone().into_iter() {
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for o in iter(self, node) {
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self.basic_blocks_instr(out, o)?;
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if self.is_cfg(o) {
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cfg_index = o;
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continue;
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}
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self.basic_blocks_instr(out, o)?;
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}
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if !self[cfg_index].kind.ends_basic_block()
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&& !matches!(self[cfg_index].kind, Kind::Call { .. })
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{
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writeln!(out, " goto: {cfg_index}")?;
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}
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node = cfg_index;
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}
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Kind::BinOp { .. } => unreachable!(),
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Kind::Call { .. } => {
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self.visited.unset(node as _);
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self.basic_blocks_instr(out, node)?;
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let mut cfg_index = Nid::MAX;
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for o in self[node].outputs.clone().into_iter() {
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if self.is_cfg(o) {
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cfg_index = o;
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continue;
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}
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for o in iter(self, node) {
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if self[o].inputs[0] == node {
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self.basic_blocks_instr(out, o)?;
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}
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if self.is_cfg(o) {
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cfg_index = o;
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}
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}
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node = cfg_index;
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}
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@ -1042,7 +1131,7 @@ impl Nodes {
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let mut out = String::new();
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self.visited.clear(self.values.len());
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self.basic_blocks_low(&mut out, 0).unwrap();
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println!("{out}");
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eprintln!("{out}");
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}
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fn graphviz(&self) {
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@ -1182,20 +1271,29 @@ impl ops::IndexMut<u32> for Nodes {
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}
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}
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#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord)]
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#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord, Default)]
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#[repr(u8)]
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pub enum Kind {
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#[default]
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Start,
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End,
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If,
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Region,
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Loop,
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Return,
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CInt { value: i64 },
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CInt {
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value: i64,
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},
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Phi,
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Tuple { index: u32 },
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BinOp { op: lexer::TokenKind },
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Call { func: ty::Func },
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Tuple {
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index: u32,
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},
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BinOp {
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op: lexer::TokenKind,
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},
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Call {
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func: ty::Func,
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},
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}
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impl Kind {
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@ -1238,7 +1336,7 @@ impl fmt::Display for Kind {
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}
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}
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#[derive(Debug)]
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#[derive(Debug, Default)]
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struct Node {
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inputs: Vec<Nid>,
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outputs: Vec<Nid>,
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@ -1247,6 +1345,7 @@ struct Node {
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depth: u32,
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lock_rc: u32,
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ty: ty::Id,
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loop_depth: u32,
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}
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impl Node {
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@ -2012,6 +2111,13 @@ impl Codegen {
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self.ci.nodes.modify_input(node, 1, self.ci.ctrl);
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let idx = self.ci.nodes[node]
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.outputs
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.iter()
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.position(|&n| self.ci.nodes.is_cfg(n))
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.unwrap();
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self.ci.nodes[node].outputs.swap(idx, 0);
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self.ci.ctrl = bre;
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if bre == Nid::MAX {
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return None;
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@ -3255,6 +3361,47 @@ impl Codegen {
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}
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fn gcm(&mut self) {
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fn loop_depth(target: Nid, nodes: &mut Nodes) -> u32 {
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if nodes[target].loop_depth != 0 {
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return nodes[target].loop_depth;
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}
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nodes[target].loop_depth = match nodes[target].kind {
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Kind::Tuple { .. } | Kind::Call { .. } | Kind::Return | Kind::If => {
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loop_depth(nodes[target].inputs[0], nodes)
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}
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Kind::Region => loop_depth(idom(nodes, target), nodes),
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Kind::Loop => {
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let depth = loop_depth(nodes[target].inputs[0], nodes) + 1;
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let mut cursor = nodes[target].inputs[1];
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while cursor != target {
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nodes[cursor].loop_depth = depth;
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let next = idom(nodes, cursor);
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if let Kind::Tuple { index } = nodes[cursor].kind
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&& nodes[next].kind == Kind::If
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{
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let other = *nodes[next].outputs.iter().find(|&&n| matches!(nodes[n].kind, Kind::Tuple { index: oi } if index != oi)).unwrap();
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nodes[other].loop_depth = depth - 1;
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}
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cursor = next;
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}
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depth
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}
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Kind::Start | Kind::End => 1,
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Kind::CInt { .. } | Kind::Phi | Kind::BinOp { .. } => {
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unreachable!()
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}
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};
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nodes[target].loop_depth
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}
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fn better(nodes: &mut Nodes, is: Nid, then: Nid) -> bool {
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loop_depth(is, nodes) < loop_depth(then, nodes)
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|| idepth(nodes, is) > idepth(nodes, then)
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|| nodes[then].kind == Kind::If
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}
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fn idepth(nodes: &mut Nodes, target: Nid) -> u32 {
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if target == 0 {
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return 0;
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|
@ -3279,21 +3426,8 @@ impl Codegen {
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| Kind::Return
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| Kind::If => nodes[target].inputs[0],
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Kind::Region => {
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let &[mut lcfg, mut rcfg] = nodes[target].inputs.as_slice() else {
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unreachable!()
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};
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while lcfg != rcfg {
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let [ldepth, rdepth] = [idepth(nodes, lcfg), idepth(nodes, rcfg)];
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if ldepth >= rdepth {
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lcfg = idom(nodes, lcfg);
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}
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if ldepth <= rdepth {
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rcfg = idom(nodes, rcfg);
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}
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}
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lcfg
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let &[lcfg, rcfg] = nodes[target].inputs.as_slice() else { unreachable!() };
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common_dom(lcfg, rcfg, nodes)
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}
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}
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}
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|
@ -3340,7 +3474,7 @@ impl Codegen {
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}
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}
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fn push_down(nodes: &mut Nodes, node: Nid, lowest_pos: &mut [u32]) {
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fn push_down(nodes: &mut Nodes, node: Nid) {
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if !nodes.visited.set(node as _) {
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return;
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}
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|
@ -3348,47 +3482,72 @@ impl Codegen {
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// TODO: handle memory nodes first
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if nodes[node].kind.is_pinned() {
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for i in 0..nodes[node].inputs.len() {
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let i = nodes[node].inputs[i];
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push_up(nodes, i);
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// TODO: use buffer to avoid allocation or better yet queue the location changes
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for i in nodes[node].outputs.clone() {
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push_down(nodes, i);
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}
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} else {
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let mut max = 0;
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for i in 0..nodes[node].inputs.len() {
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let i = nodes[node].inputs[i];
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let is_call = matches!(nodes[i].kind, Kind::Call { .. });
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if nodes.is_cfg(i) && !is_call {
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continue;
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let mut min = None::<Nid>;
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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);
|
||||
}
|
||||
push_up(nodes, i);
|
||||
if idepth(nodes, i) > idepth(nodes, max) {
|
||||
max = if is_call { i } else { idom(nodes, i) };
|
||||
}
|
||||
}
|
||||
|
||||
if max == 0 {
|
||||
return;
|
||||
fn use_block(target: Nid, from: Nid, nodes: &mut Nodes) -> Nid {
|
||||
if nodes[from].kind != Kind::Phi {
|
||||
return idom(nodes, from);
|
||||
}
|
||||
|
||||
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);
|
||||
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);
|
||||
push_down(&mut self.ci.nodes, self.ci.start);
|
||||
}
|
||||
}
|
||||
|
||||
|
@ -3626,6 +3785,6 @@ mod tests {
|
|||
const_folding_with_arg => README;
|
||||
// FIXME: contains redundant copies
|
||||
branch_assignments => README;
|
||||
//exhaustive_loop_testing => README;
|
||||
exhaustive_loop_testing => README;
|
||||
}
|
||||
}
|
||||
|
|
|
@ -6,6 +6,6 @@ main:
|
|||
LD r31, r254, 0a, 16h
|
||||
ADDI64 r254, r254, 16d
|
||||
JALA r0, r31, 0a
|
||||
code size: 236
|
||||
code size: 239
|
||||
ret: 50
|
||||
status: Ok(())
|
||||
|
|
|
@ -11,6 +11,6 @@ main:
|
|||
LD r31, r254, 0a, 32h
|
||||
ADDI64 r254, r254, 32d
|
||||
JALA r0, r31, 0a
|
||||
code size: 296
|
||||
code size: 299
|
||||
ret: 55
|
||||
status: Ok(())
|
||||
|
|
|
@ -14,7 +14,8 @@ fib:
|
|||
JGTS r32, r33, :0
|
||||
LI64 r1, 1d
|
||||
JMP :1
|
||||
0: ADDI64 r33, r32, -1d
|
||||
0: CP r33, r32
|
||||
ADDI64 r33, r33, -1d
|
||||
CP r2, r33
|
||||
JAL r31, r0, :fib
|
||||
CP r33, r1
|
||||
|
@ -26,6 +27,6 @@ fib:
|
|||
1: LD r31, r254, 0a, 24h
|
||||
ADDI64 r254, r254, 24d
|
||||
JALA r0, r31, 0a
|
||||
code size: 228
|
||||
code size: 231
|
||||
ret: 55
|
||||
status: Ok(())
|
||||
|
|
|
@ -57,10 +57,11 @@ example:
|
|||
CMPUI r35, r35, 0d
|
||||
OR r34, r34, r35
|
||||
JEQ r34, r0, :0
|
||||
CP r34, r33
|
||||
LI64 r35, 1024d
|
||||
ADDI64 r35, r35, 0d
|
||||
ADDI64 r35, r35, 1d
|
||||
DIRS64 r0, r34, r33, r35
|
||||
DIRS64 r0, r34, r34, r35
|
||||
ADDI64 r32, r34, 0d
|
||||
JMP :1
|
||||
0: CP r32, r33
|
||||
|
@ -82,17 +83,20 @@ integer:
|
|||
LI64 r3, 4d
|
||||
ECA
|
||||
CP r34, r1
|
||||
CP r35, r32
|
||||
LI64 r36, 0d
|
||||
CMPS r35, r32, r36
|
||||
CMPS r35, r35, r36
|
||||
CMPUI r35, r35, 0d
|
||||
CP r36, r33
|
||||
LI64 r37, 0d
|
||||
CMPS r36, r33, r37
|
||||
CMPS r36, r36, r37
|
||||
CMPUI r36, r36, 0d
|
||||
OR r35, r35, r36
|
||||
JEQ r35, r0, :0
|
||||
CP r35, r34
|
||||
SUB64 r33, r33, r32
|
||||
ADDI64 r33, r33, 1d
|
||||
DIRS64 r0, r35, r34, r33
|
||||
DIRS64 r0, r35, r35, r33
|
||||
ADD64 r1, r35, r32
|
||||
JMP :1
|
||||
0: CP r1, r34
|
||||
|
@ -152,6 +156,6 @@ line:
|
|||
2: LD r31, r254, 48a, 32h
|
||||
ADDI64 r254, r254, 80d
|
||||
JALA r0, r31, 0a
|
||||
code size: 1404
|
||||
code size: 1416
|
||||
ret: 0
|
||||
status: Ok(())
|
||||
|
|
|
@ -16,13 +16,14 @@ integer_range:
|
|||
LI64 r2, 3d
|
||||
LI64 r3, 4d
|
||||
ECA
|
||||
CP r34, r1
|
||||
SUB64 r33, r33, r32
|
||||
ADDI64 r33, r33, 1d
|
||||
DIRU64 r0, r34, r1, r33
|
||||
DIRU64 r0, r34, r34, r33
|
||||
ADD64 r1, r34, r32
|
||||
LD r31, r254, 0a, 32h
|
||||
ADDI64 r254, r254, 32d
|
||||
JALA r0, r31, 0a
|
||||
code size: 211
|
||||
code size: 214
|
||||
ret: 42
|
||||
status: Ok(())
|
||||
|
|
|
@ -15,7 +15,8 @@ fib:
|
|||
2: LI64 r35, 0d
|
||||
JNE r32, r35, :0
|
||||
JMP :1
|
||||
0: ADD64 r35, r33, r34
|
||||
0: CP r35, r33
|
||||
ADD64 r35, r35, r34
|
||||
CP r33, r34
|
||||
CP r34, r35
|
||||
ADDI64 r32, r32, -1d
|
||||
|
@ -24,6 +25,6 @@ fib:
|
|||
LD r31, r254, 0a, 40h
|
||||
ADDI64 r254, r254, 40d
|
||||
JALA r0, r31, 0a
|
||||
code size: 215
|
||||
code size: 218
|
||||
ret: 55
|
||||
status: Ok(())
|
||||
|
|
|
@ -43,7 +43,8 @@ request_page:
|
|||
ST r31, r254, 0a, 32h
|
||||
CP r32, r2
|
||||
LRA r33, r0, :"\0\u{1}xxxxxxxx"
|
||||
ADDI64 r34, r33, 1d
|
||||
CP r34, r33
|
||||
ADDI64 r34, r34, 1d
|
||||
ST r32, r34, 0a, 1h
|
||||
LI64 r2, 3d
|
||||
LI64 r3, 2d
|
||||
|
@ -53,6 +54,6 @@ request_page:
|
|||
LD r31, r254, 0a, 32h
|
||||
ADDI64 r254, r254, 32d
|
||||
JALA r0, r31, 0a
|
||||
code size: 440
|
||||
code size: 443
|
||||
ret: 42
|
||||
status: Ok(())
|
||||
|
|
|
@ -28,7 +28,8 @@ fib_iter:
|
|||
2: LI64 r35, 0d
|
||||
JNE r32, r35, :0
|
||||
JMP :1
|
||||
0: ADD64 r35, r33, r34
|
||||
0: CP r35, r33
|
||||
ADD64 r35, r35, r34
|
||||
CP r33, r34
|
||||
CP r34, r35
|
||||
ADDI64 r32, r32, -1d
|
||||
|
@ -43,11 +44,13 @@ fib:
|
|||
CP r32, r2
|
||||
LI64 r33, 2d
|
||||
JLTS r32, r33, :0
|
||||
ADDI64 r33, r32, -1d
|
||||
CP r33, r32
|
||||
ADDI64 r33, r33, -1d
|
||||
CP r2, r33
|
||||
JAL r31, r0, :fib
|
||||
CP r33, r1
|
||||
ADDI64 r34, r32, -2d
|
||||
CP r34, r32
|
||||
ADDI64 r34, r34, -2d
|
||||
CP r2, r34
|
||||
JAL r31, r0, :fib
|
||||
CP r34, r1
|
||||
|
@ -57,6 +60,6 @@ fib:
|
|||
1: LD r31, r254, 0a, 32h
|
||||
ADDI64 r254, r254, 32d
|
||||
JALA r0, r31, 0a
|
||||
code size: 455
|
||||
code size: 464
|
||||
ret: 0
|
||||
status: Ok(())
|
||||
|
|
Loading…
Reference in a new issue