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fixing float conversion constant folding

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This commit is contained in:
Jakub Doka 2024-11-09 13:54:08 +01:00
parent bedffa9b32
commit 63a1c7feb4
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GPG key ID: C6E9A89936B8C143
3 changed files with 93 additions and 38 deletions
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2
lang/src/lexer.rs
View file

@ -267,7 +267,7 @@ impl TokenKind {
Self::Float => (value as f64).to_bits() as _,
Self::Number => {
debug_assert!(float);
f64::from_bits(value as _).to_bits() as _
f64::from_bits(value as _) as _
}
s => todo!("{s}"),
}

2
lang/src/son.rs
View file

@ -2321,7 +2321,7 @@ impl<'a> Codegen<'a> {
{
panic!("{e} {}", vc);
} else {
log::trace!("{}", vc);
log::info!("{}", vc);
}
}

119
lang/src/son/hbvm/my_regalloc.rs
View file

@ -10,7 +10,7 @@ use {
Offset, PLoc, Reloc, Sig, TypedReloc, Types,
},
alloc::{borrow::ToOwned, vec::Vec},
core::{mem, ops::Range},
core::{mem, ops::Range, u32, usize},
hbbytecode::{self as instrs},
};
@ -34,6 +34,8 @@ impl HbvmBackend {
self.emit(instrs::st(reg::RET_ADDR + fuc.tail as u8, reg::STACK_PTR, 0, 0));
}
res.node_to_reg[MEM as usize] = res.bundles.len() as u8 + 1;
let reg_offset = if fuc.tail { reg::RET + 12 } else { reg::RET_ADDR + 1 };
res.node_to_reg.iter_mut().filter(|r| **r != 0).for_each(|r| {
@ -82,6 +84,7 @@ impl HbvmBackend {
}
let node = &fuc.nodes[nid];
let bref = mem::replace(&mut fuc.backrefs[nid as usize], u16::MAX);
let extend = |base: ty::Id, dest: ty::Id, from: Nid, to: Nid| {
let (bsize, dsize) = (tys.size_of(base), tys.size_of(dest));
@ -114,50 +117,98 @@ impl HbvmBackend {
unreachable!()
};
self.emit(extend(fuc.nodes[lhs].ty, fuc.nodes[lhs].ty.extend(), 0, 0));
self.emit(extend(fuc.nodes[rhs].ty, fuc.nodes[rhs].ty.extend(), 1, 1));
self.emit(extend(
fuc.nodes[lhs].ty,
fuc.nodes[lhs].ty.extend(),
lhs,
lhs,
));
self.emit(extend(
fuc.nodes[rhs].ty,
fuc.nodes[rhs].ty.extend(),
rhs,
rhs,
));
let rel = Reloc::new(self.code.len(), 3, 2);
self.jump_relocs.push((node.outputs[!swapped as usize], rel));
self.emit(op(atr(lhs), atr(rhs), 0));
} else {
self.emit(extend(fuc.nodes[cnd].ty, fuc.nodes[cnd].ty.extend(), 0, 0));
self.emit(extend(
fuc.nodes[cnd].ty,
fuc.nodes[cnd].ty.extend(),
cnd,
cnd,
));
let rel = Reloc::new(self.code.len(), 3, 2);
self.jump_relocs.push((node.outputs[0], rel));
self.emit(instrs::jne(atr(cnd), reg::ZERO, 0));
}
}
Kind::Loop | Kind::Region => {
if (mem::replace(&mut fuc.backrefs[nid as usize], u16::MAX) != u16::MAX)
^ (node.kind == Kind::Loop)
{
let index = (node.kind == Kind::Loop) as usize + 1;
let mut emit_moves = |index| {
let mut moves = vec![];
for &out in node.outputs.iter() {
if fuc.nodes[out].is_data_phi()
&& atr(out) != atr(fuc.nodes[out].inputs[index])
if fuc.nodes[out].is_data_phi() {
debug_assert_eq!(
fuc.backrefs[fuc.nodes[out].inputs[index] as usize],
u16::MAX,
"{:?}\n{:?}",
node,
fuc.nodes[fuc.nodes[out].inputs[index]]
);
if atr(out) != atr(fuc.nodes[out].inputs[index]) {
if atr(out) == 34 && atr(fuc.nodes[out].inputs[index]) == 32
{
self.emit(instrs::cp(
std::dbg!(&node, out, &fuc.nodes[out]);
}
moves.push([
atr(out),
atr(fuc.nodes[out].inputs[index]),
));
0,
]);
}
}
}
moves.sort_unstable_by(|[aa, ab, _], [ba, bb, _]| {
if aa == bb && ab == ba {
core::cmp::Ordering::Equal
} else if aa == bb {
core::cmp::Ordering::Greater
} else {
core::cmp::Ordering::Less
}
});
moves.dedup_by(|[aa, ab, _], [ba, bb, kind]| {
if aa == bb && ab == ba {
*kind = 1;
true
} else {
false
}
});
for [dst, src, kind] in moves {
if kind == 0 {
self.emit(instrs::cp(dst, src));
} else {
self.emit(instrs::swa(dst, src));
}
}
};
if (bref != u16::MAX) ^ (node.kind == Kind::Loop) {
let index = (node.kind == Kind::Loop) as usize + 1;
emit_moves(index);
let rel = Reloc::new(self.code.len(), 1, 4);
self.jump_relocs.push((nid, rel));
self.emit(instrs::jmp(0));
} else {
let index = (node.kind != Kind::Loop) as usize + 1;
for &out in node.outputs.iter() {
if fuc.nodes[out].is_data_phi()
&& atr(out) != atr(fuc.nodes[out].inputs[index])
{
self.emit(instrs::cp(
atr(out),
atr(fuc.nodes[out].inputs[index]),
));
}
}
emit_moves(index);
}
}
Kind::Return => {
@ -241,8 +292,18 @@ impl HbvmBackend {
} else if let Some(against) = op.cmp_against() {
let op_ty = fuc.nodes[lhs].ty;
self.emit(extend(fuc.nodes[lhs].ty, fuc.nodes[lhs].ty.extend(), 0, 0));
self.emit(extend(fuc.nodes[rhs].ty, fuc.nodes[rhs].ty.extend(), 1, 1));
self.emit(extend(
fuc.nodes[lhs].ty,
fuc.nodes[lhs].ty.extend(),
lhs,
lhs,
));
self.emit(extend(
fuc.nodes[rhs].ty,
fuc.nodes[rhs].ty.extend(),
rhs,
rhs,
));
if op_ty.is_float() && matches!(op, TokenKind::Le | TokenKind::Ge) {
let opop = match op {
@ -253,7 +314,7 @@ impl HbvmBackend {
let op_fn = opop.float_cmp(op_ty).unwrap();
self.emit(op_fn(atr(nid), atr(lhs), atr(rhs)));
self.emit(instrs::not(atr(nid), atr(nid)));
} else if op_ty.is_integer() {
} else {
let op_fn =
if op_ty.is_signed() { instrs::cmps } else { instrs::cmpu };
self.emit(op_fn(atr(nid), atr(lhs), atr(rhs)));
@ -261,8 +322,6 @@ impl HbvmBackend {
if matches!(op, TokenKind::Eq | TokenKind::Lt | TokenKind::Gt) {
self.emit(instrs::not(atr(nid), atr(nid)));
}
} else {
todo!("unhandled operator: {op}");
}
} else {
todo!("unhandled operator: {op}");
@ -787,11 +846,7 @@ impl<'a> Env<'a> {
}
fn append_bundle(&mut self, inst: Nid, bundle: &mut Bundle, use_buf: &mut Vec<Nid>) {
let mut dom = self.ctx.idom_of(inst);
if self.ctx.nodes[dom].kind == Kind::Loop && self.ctx.nodes[inst].kind == Kind::Phi {
dom = self.ctx.nodes.idom(dom);
dom = self.ctx.idom_of(dom);
}
let dom = self.ctx.idom_of(inst);
self.ctx.uses_of(inst, use_buf);
for uinst in use_buf.drain(..) {
let cursor = self.ctx.use_block(inst, uinst);